There's a lot of bugs regarding flights and how they work in the latest versions. One of them being the accelerate action being useless. I suppose the flight is always on accelerate, even when you don't want it to be but even so, the speed is false. Mounts move at 15m/s, flights on max speed (accelerate) move at 13m/s, mounts are faster than flights. We all know that. Right???
WRONG. If we put a 15m/s mount next to a 13m/s flight and run in a straight line we notice that the flight moves faster than the mount. What kind of broken logic is this? So yeah, that's the bug. FLIGHTS ARE FASTER THAN MOUNTS.