diff --git a/packages/react-dom-bindings/src/client/ReactDOMComponent.js b/packages/react-dom-bindings/src/client/ReactDOMComponent.js
index 037d787197c85..74e0c9a706c16 100644
--- a/packages/react-dom-bindings/src/client/ReactDOMComponent.js
+++ b/packages/react-dom-bindings/src/client/ReactDOMComponent.js
@@ -883,11 +883,9 @@ export function diffHydratedProperties(
   shouldWarnDev: boolean,
   parentNamespaceDev: string,
 ): null | Array<mixed> {
-  let isCustomComponentTag;
   let extraAttributeNames: Set<string>;
 
   if (__DEV__) {
-    isCustomComponentTag = isCustomComponent(tag, rawProps);
     validatePropertiesInDevelopment(tag, rawProps);
   }
 
@@ -953,6 +951,10 @@ export function diffHydratedProperties(
       break;
   }
 
+  if (rawProps.hasOwnProperty('onScroll')) {
+    listenToNonDelegatedEvent('scroll', domElement);
+  }
+
   assertValidProps(tag, rawProps);
 
   if (__DEV__) {
@@ -978,207 +980,196 @@ export function diffHydratedProperties(
   }
 
   let updatePayload = null;
-  for (const propKey in rawProps) {
-    if (!rawProps.hasOwnProperty(propKey)) {
-      continue;
-    }
-    const nextProp = rawProps[propKey];
-    if (propKey === CHILDREN) {
-      // For text content children we compare against textContent. This
-      // might match additional HTML that is hidden when we read it using
-      // textContent. E.g. "foo" will match "f<span>oo</span>" but that still
-      // satisfies our requirement. Our requirement is not to produce perfect
-      // HTML and attributes. Ideally we should preserve structure but it's
-      // ok not to if the visible content is still enough to indicate what
-      // even listeners these nodes might be wired up to.
-      // TODO: Warn if there is more than a single textNode as a child.
-      // TODO: Should we use domElement.firstChild.nodeValue to compare?
-      if (typeof nextProp === 'string') {
-        if (domElement.textContent !== nextProp) {
-          if (rawProps[SUPPRESS_HYDRATION_WARNING] !== true) {
-            checkForUnmatchedText(
-              domElement.textContent,
-              nextProp,
-              isConcurrentMode,
-              shouldWarnDev,
-            );
-          }
-          updatePayload = [CHILDREN, nextProp];
-        }
-      } else if (typeof nextProp === 'number') {
-        if (domElement.textContent !== '' + nextProp) {
-          if (rawProps[SUPPRESS_HYDRATION_WARNING] !== true) {
-            checkForUnmatchedText(
-              domElement.textContent,
-              nextProp,
-              isConcurrentMode,
-              shouldWarnDev,
-            );
-          }
-          updatePayload = [CHILDREN, '' + nextProp];
-        }
+
+  const children = rawProps.children;
+  // For text content children we compare against textContent. This
+  // might match additional HTML that is hidden when we read it using
+  // textContent. E.g. "foo" will match "f<span>oo</span>" but that still
+  // satisfies our requirement. Our requirement is not to produce perfect
+  // HTML and attributes. Ideally we should preserve structure but it's
+  // ok not to if the visible content is still enough to indicate what
+  // even listeners these nodes might be wired up to.
+  // TODO: Warn if there is more than a single textNode as a child.
+  // TODO: Should we use domElement.firstChild.nodeValue to compare?
+  if (typeof children === 'string' || typeof children === 'number') {
+    if (domElement.textContent !== '' + children) {
+      if (rawProps[SUPPRESS_HYDRATION_WARNING] !== true) {
+        checkForUnmatchedText(
+          domElement.textContent,
+          children,
+          isConcurrentMode,
+          shouldWarnDev,
+        );
       }
-    } else if (registrationNameDependencies.hasOwnProperty(propKey)) {
-      if (nextProp != null) {
-        if (__DEV__ && typeof nextProp !== 'function') {
-          warnForInvalidEventListener(propKey, nextProp);
-        }
-        if (propKey === 'onScroll') {
-          listenToNonDelegatedEvent('scroll', domElement);
-        }
+      if (!isConcurrentMode) {
+        updatePayload = [CHILDREN, children];
       }
-    } else if (
-      shouldWarnDev &&
-      __DEV__ &&
-      // Convince Flow we've calculated it (it's DEV-only in this method.)
-      typeof isCustomComponentTag === 'boolean'
-    ) {
-      // Validate that the properties correspond to their expected values.
-      let serverValue;
-      const propertyInfo =
-        isCustomComponentTag && enableCustomElementPropertySupport
-          ? null
-          : getPropertyInfo(propKey);
-      if (rawProps[SUPPRESS_HYDRATION_WARNING] === true) {
-        // Don't bother comparing. We're ignoring all these warnings.
-      } else if (
-        propKey === SUPPRESS_CONTENT_EDITABLE_WARNING ||
-        propKey === SUPPRESS_HYDRATION_WARNING ||
-        // Controlled attributes are not validated
-        // TODO: Only ignore them on controlled tags.
-        propKey === 'value' ||
-        propKey === 'checked' ||
-        propKey === 'selected'
-      ) {
-        // Noop
-      } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
-        const serverHTML = domElement.innerHTML;
-        const nextHtml = nextProp ? nextProp[HTML] : undefined;
-        if (nextHtml != null) {
-          const expectedHTML = normalizeHTML(domElement, nextHtml);
-          if (expectedHTML !== serverHTML) {
-            warnForPropDifference(propKey, serverHTML, expectedHTML);
+    }
+  }
+
+  if (__DEV__ && shouldWarnDev) {
+    const isCustomComponentTag = isCustomComponent(tag, rawProps);
+
+    for (const propKey in rawProps) {
+      if (!rawProps.hasOwnProperty(propKey)) {
+        continue;
+      }
+      const nextProp = rawProps[propKey];
+      if (propKey === CHILDREN) {
+        // Checked above already
+      } else if (registrationNameDependencies.hasOwnProperty(propKey)) {
+        if (nextProp != null) {
+          if (typeof nextProp !== 'function') {
+            warnForInvalidEventListener(propKey, nextProp);
           }
         }
-      } else if (propKey === STYLE) {
-        // $FlowFixMe - Should be inferred as not undefined.
-        extraAttributeNames.delete(propKey);
-
-        if (canDiffStyleForHydrationWarning) {
-          const expectedStyle = createDangerousStringForStyles(nextProp);
-          serverValue = domElement.getAttribute('style');
-          if (expectedStyle !== serverValue) {
-            warnForPropDifference(propKey, serverValue, expectedStyle);
+      } else {
+        // Validate that the properties correspond to their expected values.
+        let serverValue;
+        const propertyInfo =
+          isCustomComponentTag && enableCustomElementPropertySupport
+            ? null
+            : getPropertyInfo(propKey);
+        if (rawProps[SUPPRESS_HYDRATION_WARNING] === true) {
+          // Don't bother comparing. We're ignoring all these warnings.
+        } else if (
+          propKey === SUPPRESS_CONTENT_EDITABLE_WARNING ||
+          propKey === SUPPRESS_HYDRATION_WARNING ||
+          // Controlled attributes are not validated
+          // TODO: Only ignore them on controlled tags.
+          propKey === 'value' ||
+          propKey === 'checked' ||
+          propKey === 'selected'
+        ) {
+          // Noop
+        } else if (propKey === DANGEROUSLY_SET_INNER_HTML) {
+          const serverHTML = domElement.innerHTML;
+          const nextHtml = nextProp ? nextProp[HTML] : undefined;
+          if (nextHtml != null) {
+            const expectedHTML = normalizeHTML(domElement, nextHtml);
+            if (expectedHTML !== serverHTML) {
+              warnForPropDifference(propKey, serverHTML, expectedHTML);
+            }
           }
-        }
-      } else if (
-        enableCustomElementPropertySupport &&
-        isCustomComponentTag &&
-        (propKey === 'offsetParent' ||
-          propKey === 'offsetTop' ||
-          propKey === 'offsetLeft' ||
-          propKey === 'offsetWidth' ||
-          propKey === 'offsetHeight' ||
-          propKey === 'isContentEditable' ||
-          propKey === 'outerText' ||
-          propKey === 'outerHTML')
-      ) {
-        // $FlowFixMe - Should be inferred as not undefined.
-        extraAttributeNames.delete(propKey.toLowerCase());
-        if (__DEV__) {
-          console.error(
-            'Assignment to read-only property will result in a no-op: `%s`',
-            propKey,
-          );
-        }
-      } else if (isCustomComponentTag && !enableCustomElementPropertySupport) {
-        // $FlowFixMe - Should be inferred as not undefined.
-        extraAttributeNames.delete(propKey.toLowerCase());
-        serverValue = getValueForAttribute(
-          domElement,
-          propKey,
-          nextProp,
-          isCustomComponentTag,
-        );
+        } else if (propKey === STYLE) {
+          // $FlowFixMe - Should be inferred as not undefined.
+          extraAttributeNames.delete(propKey);
 
-        if (nextProp !== serverValue) {
-          warnForPropDifference(propKey, serverValue, nextProp);
-        }
-      } else if (
-        !shouldIgnoreAttribute(propKey, propertyInfo, isCustomComponentTag) &&
-        !shouldRemoveAttribute(
-          propKey,
-          nextProp,
-          propertyInfo,
-          isCustomComponentTag,
-        )
-      ) {
-        let isMismatchDueToBadCasing = false;
-        if (propertyInfo !== null) {
+          if (canDiffStyleForHydrationWarning) {
+            const expectedStyle = createDangerousStringForStyles(nextProp);
+            serverValue = domElement.getAttribute('style');
+            if (expectedStyle !== serverValue) {
+              warnForPropDifference(propKey, serverValue, expectedStyle);
+            }
+          }
+        } else if (
+          enableCustomElementPropertySupport &&
+          isCustomComponentTag &&
+          (propKey === 'offsetParent' ||
+            propKey === 'offsetTop' ||
+            propKey === 'offsetLeft' ||
+            propKey === 'offsetWidth' ||
+            propKey === 'offsetHeight' ||
+            propKey === 'isContentEditable' ||
+            propKey === 'outerText' ||
+            propKey === 'outerHTML')
+        ) {
+          // $FlowFixMe - Should be inferred as not undefined.
+          extraAttributeNames.delete(propKey.toLowerCase());
+          if (__DEV__) {
+            console.error(
+              'Assignment to read-only property will result in a no-op: `%s`',
+              propKey,
+            );
+          }
+        } else if (
+          isCustomComponentTag &&
+          !enableCustomElementPropertySupport
+        ) {
           // $FlowFixMe - Should be inferred as not undefined.
-          extraAttributeNames.delete(propertyInfo.attributeName);
-          serverValue = getValueForProperty(
+          extraAttributeNames.delete(propKey.toLowerCase());
+          serverValue = getValueForAttribute(
             domElement,
             propKey,
             nextProp,
-            propertyInfo,
+            isCustomComponentTag,
           );
-        } else {
-          let ownNamespaceDev = parentNamespaceDev;
-          if (ownNamespaceDev === HTML_NAMESPACE) {
-            ownNamespaceDev = getIntrinsicNamespace(tag);
+
+          if (nextProp !== serverValue) {
+            warnForPropDifference(propKey, serverValue, nextProp);
           }
-          if (ownNamespaceDev === HTML_NAMESPACE) {
+        } else if (
+          !shouldIgnoreAttribute(propKey, propertyInfo, isCustomComponentTag) &&
+          !shouldRemoveAttribute(
+            propKey,
+            nextProp,
+            propertyInfo,
+            isCustomComponentTag,
+          )
+        ) {
+          let isMismatchDueToBadCasing = false;
+          if (propertyInfo !== null) {
             // $FlowFixMe - Should be inferred as not undefined.
-            extraAttributeNames.delete(propKey.toLowerCase());
+            extraAttributeNames.delete(propertyInfo.attributeName);
+            serverValue = getValueForProperty(
+              domElement,
+              propKey,
+              nextProp,
+              propertyInfo,
+            );
           } else {
-            const standardName = getPossibleStandardName(propKey);
-            if (standardName !== null && standardName !== propKey) {
-              // If an SVG prop is supplied with bad casing, it will
-              // be successfully parsed from HTML, but will produce a mismatch
-              // (and would be incorrectly rendered on the client).
-              // However, we already warn about bad casing elsewhere.
-              // So we'll skip the misleading extra mismatch warning in this case.
-              isMismatchDueToBadCasing = true;
+            let ownNamespaceDev = parentNamespaceDev;
+            if (ownNamespaceDev === HTML_NAMESPACE) {
+              ownNamespaceDev = getIntrinsicNamespace(tag);
+            }
+            if (ownNamespaceDev === HTML_NAMESPACE) {
+              // $FlowFixMe - Should be inferred as not undefined.
+              extraAttributeNames.delete(propKey.toLowerCase());
+            } else {
+              const standardName = getPossibleStandardName(propKey);
+              if (standardName !== null && standardName !== propKey) {
+                // If an SVG prop is supplied with bad casing, it will
+                // be successfully parsed from HTML, but will produce a mismatch
+                // (and would be incorrectly rendered on the client).
+                // However, we already warn about bad casing elsewhere.
+                // So we'll skip the misleading extra mismatch warning in this case.
+                isMismatchDueToBadCasing = true;
+                // $FlowFixMe - Should be inferred as not undefined.
+                extraAttributeNames.delete(standardName);
+              }
               // $FlowFixMe - Should be inferred as not undefined.
-              extraAttributeNames.delete(standardName);
+              extraAttributeNames.delete(propKey);
             }
-            // $FlowFixMe - Should be inferred as not undefined.
-            extraAttributeNames.delete(propKey);
+            serverValue = getValueForAttribute(
+              domElement,
+              propKey,
+              nextProp,
+              isCustomComponentTag,
+            );
           }
-          serverValue = getValueForAttribute(
-            domElement,
-            propKey,
-            nextProp,
-            isCustomComponentTag,
-          );
-        }
 
-        const dontWarnCustomElement =
-          enableCustomElementPropertySupport &&
-          isCustomComponentTag &&
-          (typeof nextProp === 'function' || typeof nextProp === 'object');
-        if (
-          !dontWarnCustomElement &&
-          nextProp !== serverValue &&
-          !isMismatchDueToBadCasing
-        ) {
-          warnForPropDifference(propKey, serverValue, nextProp);
+          const dontWarnCustomElement =
+            enableCustomElementPropertySupport &&
+            isCustomComponentTag &&
+            (typeof nextProp === 'function' || typeof nextProp === 'object');
+          if (
+            !dontWarnCustomElement &&
+            nextProp !== serverValue &&
+            !isMismatchDueToBadCasing
+          ) {
+            warnForPropDifference(propKey, serverValue, nextProp);
+          }
         }
       }
     }
-  }
 
-  if (__DEV__) {
-    if (shouldWarnDev) {
-      if (
-        // $FlowFixMe - Should be inferred as not undefined.
-        extraAttributeNames.size > 0 &&
-        rawProps[SUPPRESS_HYDRATION_WARNING] !== true
-      ) {
-        // $FlowFixMe - Should be inferred as not undefined.
-        warnForExtraAttributes(extraAttributeNames);
-      }
+    if (
+      // $FlowFixMe - Should be inferred as not undefined.
+      extraAttributeNames.size > 0 &&
+      rawProps[SUPPRESS_HYDRATION_WARNING] !== true
+    ) {
+      // $FlowFixMe - Should be inferred as not undefined.
+      warnForExtraAttributes(extraAttributeNames);
     }
   }
 
diff --git a/packages/react-dom/src/__tests__/ReactDOMFizzSuppressHydrationWarning-test.js b/packages/react-dom/src/__tests__/ReactDOMFizzSuppressHydrationWarning-test.js
index b77c88ca5081b..c53ddee3fb13b 100644
--- a/packages/react-dom/src/__tests__/ReactDOMFizzSuppressHydrationWarning-test.js
+++ b/packages/react-dom/src/__tests__/ReactDOMFizzSuppressHydrationWarning-test.js
@@ -130,7 +130,7 @@ describe('ReactDOMFizzServerHydrationWarning', () => {
       : children;
   }
 
-  it('suppresses and fixes text mismatches with suppressHydrationWarning', async () => {
+  it('suppresses but does not fix text mismatches with suppressHydrationWarning', async () => {
     function App({isClient}) {
       return (
         <div>
@@ -163,13 +163,13 @@ describe('ReactDOMFizzServerHydrationWarning', () => {
     // The text mismatch should be *silently* fixed. Even in production.
     expect(getVisibleChildren(container)).toEqual(
       <div>
-        <span>Client Text</span>
-        <span>2</span>
+        <span>Server Text</span>
+        <span>1</span>
       </div>,
     );
   });
 
-  it('suppresses and fixes multiple text node mismatches with suppressHydrationWarning', async () => {
+  it('suppresses but does not fix multiple text node mismatches with suppressHydrationWarning', async () => {
     function App({isClient}) {
       return (
         <div>
@@ -203,8 +203,8 @@ describe('ReactDOMFizzServerHydrationWarning', () => {
     expect(getVisibleChildren(container)).toEqual(
       <div>
         <span>
-          {'Client1'}
-          {'Client2'}
+          {'Server1'}
+          {'Server2'}
         </span>
       </div>,
     );
@@ -261,19 +261,17 @@ describe('ReactDOMFizzServerHydrationWarning', () => {
     );
   });
 
-  it('suppresses and fixes client-only single text node mismatches with suppressHydrationWarning', async () => {
-    function App({isClient}) {
+  it('suppresses but does not fix client-only single text node mismatches with suppressHydrationWarning', async () => {
+    function App({text}) {
       return (
         <div>
-          <span suppressHydrationWarning={true}>
-            {isClient ? 'Client' : null}
-          </span>
+          <span suppressHydrationWarning={true}>{text}</span>
         </div>
       );
     }
     await act(() => {
       const {pipe} = ReactDOMFizzServer.renderToPipeableStream(
-        <App isClient={false} />,
+        <App text={null} />,
       );
       pipe(writable);
     });
@@ -282,7 +280,7 @@ describe('ReactDOMFizzServerHydrationWarning', () => {
         <span />
       </div>,
     );
-    ReactDOMClient.hydrateRoot(container, <App isClient={true} />, {
+    const root = ReactDOMClient.hydrateRoot(container, <App text="Client" />, {
       onRecoverableError(error) {
         Scheduler.log(error.message);
       },
@@ -290,7 +288,15 @@ describe('ReactDOMFizzServerHydrationWarning', () => {
     await waitForAll([]);
     expect(getVisibleChildren(container)).toEqual(
       <div>
-        <span>{'Client'}</span>
+        <span />
+      </div>,
+    );
+    // An update fixes it though.
+    root.render(<App text="Client 2" />);
+    await waitForAll([]);
+    expect(getVisibleChildren(container)).toEqual(
+      <div>
+        <span>Client 2</span>
       </div>,
     );
   });
@@ -495,7 +501,7 @@ describe('ReactDOMFizzServerHydrationWarning', () => {
     );
   });
 
-  it('suppresses and does not fix attribute mismatches with suppressHydrationWarning', async () => {
+  it('suppresses but does not fix attribute mismatches with suppressHydrationWarning', async () => {
     function App({isClient}) {
       return (
         <div>
diff --git a/packages/react-reconciler/src/ReactFiberHydrationContext.js b/packages/react-reconciler/src/ReactFiberHydrationContext.js
index b6c7869e4596a..e8ce874e34edc 100644
--- a/packages/react-reconciler/src/ReactFiberHydrationContext.js
+++ b/packages/react-reconciler/src/ReactFiberHydrationContext.js
@@ -728,6 +728,11 @@ function prepareToHydrateHostTextInstance(fiber: Fiber): boolean {
             isConcurrentMode,
             shouldWarnIfMismatchDev,
           );
+          if (isConcurrentMode) {
+            // In concurrent mode we never update the mismatched text,
+            // even if the error was ignored.
+            return false;
+          }
           break;
         }
         case HostSingleton:
@@ -747,6 +752,11 @@ function prepareToHydrateHostTextInstance(fiber: Fiber): boolean {
             isConcurrentMode,
             shouldWarnIfMismatchDev,
           );
+          if (isConcurrentMode) {
+            // In concurrent mode we never update the mismatched text,
+            // even if the error was ignored.
+            return false;
+          }
           break;
         }
       }