Starting zoomed in (first person): get into a vehicle seat , zoom out, exit the seat and your mouse is locked center (since it preserved that setting when you first sat down), however it doesn’t zoom back to first person leaving you bugged until you scroll again.
100% Reproduceable and only happens with VehicleSeats, not regular seats. Just put a VehicleSeat into workspace and do the above steps. I only recently noticed it, however it could have been there before.