Roger that DennisModem.
My screenshot shows some players "hanging around" outside during flight :)
Its a regular occurence seeing the glitching players and I
hope the priority is raised as it will as gigglebok says, greatly effect gameplay.
Have often abandoned flight for a more four-wheeled approach to get to a mission. It might take a lot longer but at least I get to admire the view more I suppose...

I get this a lot on line. Have added a photo of players 'flying' outside the heli alongside! Not just visual - they crash the helicopters every time. If on ground then the rotors are destroyed.