The first thing GSX is doing when invoking something is to remove all sim objects near the aircraft. A good thing with MSFS because it removes default trucks and stairs around. But why this code is also running in the P3D version? It's the reason why SODE jetways near the aircraft are deleted. The GSX configuration is the same for both simulators.
I think you caught that! Yes, we made a change and before we removed only groundvehicles in P3D, in MSFS we remove everything, because there are humans, ai planes, static planes, etc.
I've added back the "only ground vehicles" rule, in FSX/P3D only. Try to get it from Live Update, so we can test if it's working, otherwise I'll place the fix in the offline installer and rebuild it.
The Live Update is supposed to download these two files:
\Addon manager\Couatl\common\__INIT__.PYE
\Addon manager\Couatl\GSX\__INIT__.PYE