In T82940#1684935, @shukari wrote:

something to my point with the garbage collector grpNull and allDeadmen problem that cause many "not found" messages -> https://forums.bohemia.net/forums/topic/208893-increasing-alldead-and-alldeadmen-collections-during-game-cant-deletevehicle/?do=findComment&comment=3220644

Yes, and so far this problem has not been fixed.