Windows 11 Home Version 21H2 build 22000.318, Start Menu 11 v1.0. Start Menu is on, button to the left, using a custom button, Windows 7 style.
I'll have a program open, it doesn't seem to matter what the program is, the program is not full screen and not overlapping the task bar, and when I click on in the program window to do something (type, click a button, etc.), the mouse-click is passed through to Start Menu 11 and I'll get an Explorer window. I'll click the title bar of my program to give it focus, and when I click in the program window again, I'll get the same Explorer window.
It is hard to reproduce this action.
It does not happen if Start Menu 11 is off.
Any ideas? Thanks.