Ok, so I have a mildly annoying issue, not huge, but a little annoying... The taskbar can appear over the top of fullscreened apps.
This is a multimonitor issue - and happens when I fullscreen something on the primary/main monitor, and then click somewhere on another monitor so the fullscreen app loses focus. This issue does not occur if the app in question is being displayed on any of the secondary monitors.
An example of this would be a browser with a fullscreened YouTube:
Not sure honestly if this is a windows thing or a Start11 thing.
Windows 11 22H2. v22621.1413