Already tried disabling mArma which didnt help. Tried changing basic.cfg settings, didn't help. Tried disabling addons in the mission, didn't help. Now disabled ASM to see if that fixes it.
Topic on A3Wasteland forums about this problem showing i'm not the only one experiencing this:
http://forums.a3wasteland.com/index.php?topic=2150.0
My mission: https://github.com/LouDnl/ArmA3_Wasteland.Altis
Vanilla mission: https://github.com/A3Wasteland/ArmA3_Wasteland.Altis