I don't have TrackIR, I'm using Quest 3 now.
That TrackIR unplugged message popped a lot in the last few updates (all of the April updates I guess).
I have Opentrack installed but not running at the same time.
The Hot Plug button is as below attachment.
I have updated to Windows 11. It has been running well for 3-4 sessions.
P/s: In Windows 11 I used Process Lasso to disable E-core and the game would be in black screen forever. Letting the game running with all cores is fine. (my CPU is i7 14700KF).