Bug - [MenuToggle ] -Flashes the screen when used in the <MastHead>

[ChrisLee5000]

Describe the problem
When clicking the right half of a dropdown, the screen flashes and jiggles a bit.

How do you reproduce the problem?
This is visible on the PatternFly website as well as our project that has a MenuToggle in the same location in the MastHead.
On Patternfly.org, click "Release 5.3.0" to trigger the bug. It happens about 50-70% of the time when clicking it, usually on the right half of the control.

Expected behavior
No flashing or jiggling occurs.

Is this issue blocking you?
Yes

Screenshots
If applicable, add screenshots to help explain the issue.

What is your environment?

• OS: [e.g. iOS] Windows
• Browser [e.g. chrome, safari] Chrome
• Version [e.g. 22] 126.0.6478.57

What is your product and what release date are you targeting?

Any other information?