Thanks Xavier for having a look into it!
Unfortunately, though, this hasn’t been the (only) cause for this issue. For verification I loaded into LOWW and EDDF with an empty community folder, moved the camera far away and reset the position to trigger reloading the jetways. As expected, they randomly broke. I then waited for at least 5 minutes each time, leaving the camera untouched on a fixed position. These are the results:
