diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7b06fae468..de59e79c81 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -54,6 +54,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
    -  Although it no locker lock up microphone, clicking on the microphone button has no effect because Direct Line Speech does not support aborting speech recognition
 -  Fixes [#3421](https://github.com/microsoft/BotFramework-WebChat/issues/3421). With Direct Line Speech, after not able to recognize any speech, it should no longer stop working, by [@compulim](https://github.com/compulim) in PR [#3694](https://github.com/microsoft/BotFramework-WebChat/pull/3694)
 -  Fixes [#3616](https://github.com/microsoft/BotFramework-WebChat/issues/3616). [Accessibility documentation] Update activity timestamp grouping to match visual UI, by [@amal-khalaf](https://github.com/amal-khalaf) in PR [#3708](https://github.com/microsoft/BotFramework-WebChat/pull/3708)
+-  Fixes [#3718](https://github.com/microsoft/BotFramework-WebChat/issues/3718). Fixed `webpack.config.js` to use default settings of `['browser', 'module', 'main']` and resolved issues with `uuid` package in IE11, by [@compulim](https://github.com/compulim) in PR [#3726](https://github.com/microsoft/BotFramework-WebChat/pull/3726)
 
 ### Changed
 
diff --git a/packages/bundle/src/createCognitiveServicesSpeechServicesPonyfillFactory.js b/packages/bundle/src/createCognitiveServicesSpeechServicesPonyfillFactory.js
index 8ac1094a21..6e797f8fb4 100644
--- a/packages/bundle/src/createCognitiveServicesSpeechServicesPonyfillFactory.js
+++ b/packages/bundle/src/createCognitiveServicesSpeechServicesPonyfillFactory.js
@@ -1,5 +1,4 @@
 import { AudioConfig } from 'microsoft-cognitiveservices-speech-sdk/distrib/lib/src/sdk/Audio/AudioConfig';
-import { MicAudioSource } from 'microsoft-cognitiveservices-speech-sdk/distrib/lib/src/common.browser/MicAudioSource';
 import createPonyfill from 'web-speech-cognitive-services/lib/SpeechServices';
 
 function resolveFunction(fnOrValue) {
@@ -61,42 +60,6 @@ export default function createCognitiveServicesSpeechServicesPonyfillFactory({
     audioConfig = audioInputDeviceId
       ? AudioConfig.fromMicrophoneInput(audioInputDeviceId)
       : AudioConfig.fromDefaultMicrophoneInput();
-
-    const source = audioConfig.privSource;
-
-    // WORKAROUND: In Speech SDK 1.12.0-1.13.1, it dropped support of macOS/iOS Safari.
-    //             This code is adopted from microsoft-cognitiveservices-speech-sdk/src/common.browser/MicAudioSource.ts.
-    //             We will not need this code when using Speech SDK 1.14.0 or up.
-    // TODO: [P1] #3575 Remove the following lines when bumping to Speech SDK 1.14.0 or higher
-    source.createAudioContext = () => {
-      // eslint-disable-next-line no-extra-boolean-cast
-      if (!!source.privContext) {
-        return;
-      }
-
-      const AudioContext = window.AudioContext || window.webkitAudioContext;
-
-      if (typeof AudioContext === 'undefined') {
-        throw new Error('Browser does not support Web Audio API (AudioContext/webkitAudioContext is not available).');
-      }
-
-      if (navigator.mediaDevices.getSupportedConstraints().sampleRate) {
-        source.privContext = new AudioContext({ sampleRate: MicAudioSource.AUDIOFORMAT.samplesPerSec });
-      } else {
-        source.privContext = new AudioContext();
-      }
-    };
-
-    // This piece of code is adopted from microsoft-cognitiveservices-speech-sdk/common.browser/MicAudioSource.ts.
-    // Instead of closing the AudioContext, it will just suspend it. And the next time it is needed, it will be resumed (by the original code).
-    source.destroyAudioContext = () => {
-      if (!source.privContext) {
-        return;
-      }
-
-      source.privRecorder.releaseMediaResources(source.privContext);
-      source.privContext.state === 'running' && source.privContext.suspend();
-    };
   }
 
   return ({ referenceGrammarID } = {}) => {
diff --git a/packages/bundle/webpack.config.js b/packages/bundle/webpack.config.js
index 268e0d5c7e..bc861e130f 100644
--- a/packages/bundle/webpack.config.js
+++ b/packages/bundle/webpack.config.js
@@ -1,3 +1,7 @@
+/* eslint @typescript-eslint/no-var-requires: "off" */
+/* eslint no-magic-numbers: ["error", { "ignore": [2] }] */
+/* global __dirname, module, process */
+
 const { join } = require('path');
 const { resolve } = require('path');
 const { StatsWriterPlugin } = require('webpack-stats-plugin');
@@ -42,11 +46,6 @@ let config = {
         __dirname,
         'node_modules/microsoft-cognitiveservices-speech-sdk/distrib/lib/src/sdk/Audio/AudioConfig.js'
       ),
-      // TODO: [P1] #3575 Remove the following line when bumping to Speech SDK 1.14.0 or higher
-      'microsoft-cognitiveservices-speech-sdk/distrib/lib/src/common.browser/MicAudioSource': resolve(
-        __dirname,
-        'node_modules/microsoft-cognitiveservices-speech-sdk/distrib/lib/src/common.browser/MicAudioSource.js'
-      ),
       'microsoft-cognitiveservices-speech-sdk/distrib/lib/microsoft.cognitiveservices.speech.sdk': resolve(
         __dirname,
         'node_modules/microsoft-cognitiveservices-speech-sdk/distrib/lib/microsoft.cognitiveservices.speech.sdk.js'
@@ -57,18 +56,7 @@ let config = {
       ),
       react: resolve(__dirname, 'node_modules/isomorphic-react/dist/react.js'),
       'react-dom': resolve(__dirname, 'node_modules/isomorphic-react-dom/dist/react-dom.js')
-    },
-
-    // Since Webpack is configured not to transpile, we cannot use package.json/module field to load a module.
-    // The default Webpack module resolution order is: "module", then "browser", then "main".
-    //
-    // De facto entrypoint definitions:
-    // - "module": ES.next: transpilation is required for this entrypoint. It should yield code with smallest footprint.
-    // - "main": Plain old Node.js or browser: should be ES5 compatible. It may be configured to work only on either Node.js or browser.
-    // - "browser": Plain old browsers (ES5, which is supported by IE9). This entrypoint will not work on Node.js.
-    //
-    // If both "main" and "browser" are present, "main" will be for Node.js and "browser" will be for browsers.
-    mainFields: ['browser', 'main']
+    }
   }
 };
 
@@ -97,7 +85,7 @@ if (node_env !== 'production' && node_env !== 'test') {
             join(__dirname, '../core/lib'),
             join(__dirname, '../directlinespeech/lib')
           ],
-          test: /\.js$/,
+          test: /\.js$/iu,
           use: ['source-map-loader']
         }
       ]