As explained so many times on the forum, GSX vehicles:
- Read only the scenery AFCAD.
This means, depending how the AFCAD was made, it's possible that some parking position might cause such issues. Usually, it's because the AFCAD has too many nodes, but it's not the same for every aircraft and it also changes depending on the actual parked position of the plane.
As requested so many times in the forum, whenever you find a problem like this, ALWAYS provide with the following information:
1) The scenery used. If it's not default, clearly identify the scenery used and the name of the AFCAD
2) The gate used and if you customized it in GSX, and (if you did) how.
3) The airplane used and if you customized it in GSX, and (if you did) how. Actual lat/lon coordinates of your exact parking position might be useful too.
With all this information available, we MIGHT be able to do something to improve the vehicle behaviors to handle special cases. A video is not very helpful, instead.
- Are not aware of each other.
This would have an big impact on fps and performances in general, since if we tried to do this, a whole new class of issues like traffic deadlocks on the apron would happen.