Start11 really doesn't like being triggered from a taskbar being set to the top of the screen
Video linked
https://imgur.com/gallery/xMr7ORjI know moving the task bar to the top isn't supported in Win11 yet, but it's a simple registry key change (https://www.tomshardware.com/how-to/windows-11-taskbar-move-to-top). So I thought maybe you'd like to see this before moving the task bar to the top becomes an official feature.