Hello.
Can you please confirm?
There is a known bug where if you use the GetOut interaction on the rear door as a passenger, you enter this state that you have described.

At least, I can confirm the bug (for BTR) but I'm also not able to reproduce it ( random occurenc). It happend randomly / by accident - and not always but frequentl also in the BTR to me. The only solution for me was to respawn( which is anoying if there are no supplies in the vehicle and you need too much time from the respawn point to reach the vehicle in time [especially as FIA player]).

I can confirm you get stuck in the UAZ-452 Transport Van (Soviet, FIA, or Civilian) when entering through the back door.
@l909 If it's a known issue, could it be listed on https://reforger.armaplatform.com/known-issues ? Please and thank you <3.

Version: 1.8.0.10 (current)

Reproduction Steps:

1. Start a local Game Master session.

2. Spawn a UAZ-452 Transport Van.

3. Spawn a character and take control.

4. Enter the UAZ-452 through the back door.

5. SOFTLOCK: Cannot exit the vehicle through the side door or the back door, and cannot perform the open door action.