As explained so many times on the forum, whenever you find a problem with vehicles not going in the correct place with any airplane, the problem is ALWAYS caused by the GSX customization for that plane.
Since GSX doesn't come with a customization for the QW787, it has been either provided by the airplane developer, or it must be made by yourself. If the airplane comes with a GSX configuration made by QW, you should probably report this to QW, so they can fix it. If you are using a configuration made by some other user, you must report it to him, and if you made a configuration yourself, you must fix it, and set all vehicles to the correct doors.
If GSX is asking for a door even if that door looks open, it means whoever made that configuration, hasn't set the control variables correctly.