When flying multicrew in the Hind on multiplayer servers, the helicopter takes serious damage if the gunner has a big lag spike. The issue seems to be easier to produce when the helicopter is cruising at higher speed. The damage is usually loss of the tail and the helicopter catching fire. I have 16GBs of RAM and the issue is more prevalent in heavily scripted missions so it's possible it's linked to RAM. I had initially thought it might be a ping issue as I was seeing the bug with people who live in the UK (I live in the US), but I was having the same issue with someone from the US as well. The bug happens ~8 minutes into the track.
Hind_Bug_Syria-20210623-142503.trk