When I join a game on my apple ipad2 people that r suppose to be immune,then I see them at the middle of the map and shoot them and still immune.You know how when they start at their base nd are immune,maybe since I join a game it restarts counting.Any one still gets this problem?

Yea I have a post about 5 down in which I asked for a explanation of what's happening. I just get its an apple thing but in the air it seems if they are immune to apple a droid can shoot and if they are immune to droid an apple can shoot. I'm not sure what's happening and I understand we should give aspirants immunity and a few levels up immunity on takeoff but tanks no immune and besides aspirants no immunity all the way to your base.
Regardless I would just like an explanation of what's going on.