Drone bug

[Zarix]

I am in a situation were the enemy has a fleet sitting over a warp point. I have enough drones on the other side to blow the ships to bits. I give the drones orders to attack the warp point. Next turn I see that third of the drones have warped but they all have been destroyed because they didn't warp together. Two thirds of the drones are still sitting on the other side with orders to warp.

I have seen drones attacking simultaneously when they aren't going through a warp point. My drones are identical so this isn't about having different amount of movement points. Can anyone confirm this bug? If this keeps happening I might lose the game.