Did some testing and it does look like Ace could be the issue. Im getting the issue the most if you are more peolpe than ropes. In RHS UH-60 it has 6 ropes when i have 8 units in there, and they all try and go down the same time, so two of them are on top of each other, and if the top one hits the one below, its like he hits ground and lets go of the rope, and falls the rest of the way.
Is there a way to have all players be able to go into a parked heli and request a drop and then in the field its only a certain few that gets to call in an airlift/supplies/cas? This is meant for SQL's so not every normal soldier can do it. If i sync them to the logic using the script version they can all do both.