This is happening on multiple computers, some windows 11 22h2 and 23h2.
The sub menu to choose shutdown/restart options is unclickable at times launching whatever program option is underneath the flyout menu:
In the image above, clicking on sleep will not sleep, it will launch "Adobe Acrobat" which happens to be beneath that area. clicking on shutdown will instead launch "Affinity Designer" instead of shutdown because that is the program that is underneath that area.
Clicking on the power icon brings up the shutdown options flyout, if the mouse cursor does not stray away from the flyout menu, it stays in focus and works as expected. However, if the mouse cursor strays away from the floyout menu and hovers over ANYTHING else, you lose the ability to interact regain focus of the flyout menu and click any options upon it. In the image above, the mouse cursor has strayed a few pixels away from the flyout menu and "Adobe Acrobat" gets a hover highlight as if the flyout menu is not there.
Steps to reproduce:
1) change start menu "style" to "Windows 10 style", click on start, then click the power icon.
2) move the mouse cursor away from the flyout menu, do not click anything.
3) try to choose any option at all ("Sign-in options" at least comes with no interruptions to other programs, just a window to dismiss)