This sounds very similar to a post I have in the forum titled "Profiles not loading at first" [http://www.fsdreamteam.com/forum/index.php/topic,27524.0.html]where I report that at times the Aircraft profiles not loading correctly until resetting the scripting or updating the aircraft.
Here's what I wrote:
Thankfully I'm not having any major problems but I have noticed that when i first load MSFS into an airport that has been customized with GSX Pro the changes are not loaded. For example - I updated Lynchburg, VA (KLYH) and when I loaded MSFS and started at one of the updated parking areas all the equipment/vehicles were in their default locations. When I clicked the "update this parking spot" (or whatever it's actually called) all the equipment jumped to where I had moved them. It's almost like it didn't load the airport .ini file until I went to customize the airport again.
Similarly I often have issues with the embedded door stairs on my CRJ - the pilots (first out the door to the plane) follow their proper path to the stairs and either yeet into the atmosphere or just hover at the top of the ramp and slowly back up. If i restart Couatl everything works just fine...no yeeting or hovering. Once again...almost like it's not loading the aircraft .ini file correctly at first.
Anyway - I haven't found a cure for this and due to issues with AIG Traffic controller not loading visual models when the latest offline version of GSX Pro is installed, I've had to turn GSX Pro off completely for the time being.