After you do an update, and the airport screen opens, you will see a message at the top left of the screen saying, ''the airport cache is updating and will take a few seconds to complete and please be patient''. If you try do a GSX function during this airport update, the screen will momentarily change. The airport update usually takes 50 to 70 seconds, depending.
Don't try to do a GSX function until the airport update is completed and everything will function normally.