I suspect the heavy load (I had terrible frames, hundred of planes around). Maybe the moving gate wanted to load additional textures and it did not happen due to the overall performance overload.
This is possible.
When the fps is bad, the communication between different parts of GSX (the Addon Manager and Couatl) can be disrupted, because is clocked by the frame rate.
And, if you have many other addons using Simconnect as well, all trying to send many commands at once, will have to compete for attention by the sim and all those commands will end up in a queue. But if the fps is too bad the queue won't have a chance to be emptied (because new commands will keep coming), eventually leading to lost commands, so addons will start to do strange things, like missing animations, missing objects, etc.
