Must admit those invisible troops are annyoing..
You can't even kill them if you strafe all around the bunker when you dont see those, even if they are there in the sight of enemy troops sender.
Hard to defend field when you can't see troopers walk by even if you land right front of them.
I were recently flying towards a field, noticed it was under attack and found c47 rolling, shot him up and tried to look out for troopers, none found, but I've had invisible trooper experiences from the past, so I did strafe over 200 rounds of 20mm around the bunker area - couple seconds after my last strafe all around, field was captured, and not a single trooper were visible. annoying. (and this field was also big one..)