Getting this in 64bit only. - EDIT HAPPENED ONCE IN 32bit ALSO, during the training Rising Tensions at the very beginning
It happened in the first showcase 4 times before reaching Charlie, and still happens in the VR training EVERYTIME at the same point.
When starting the Checkpoint race just after shooting the soldier at 220 behind you

EDIT NUMBER 2
It appears to be happening again no matter what. switching to 32bits helped in delaying the issue, without resolving it.
I cannot find a way to sort that but just "not playing Arma".

EDIT NUMBER 3
Just reinstalled the game, and crashed at the mission startup in 64bits.
32bits seems to run fine somehow, last game session was almost 40 minutes with no crash

This is mostly frustrating, not because I cannot play, but because I cannot find a workaround...hope it helps, and you are gonna help back ;)

Gonna add the 32bits "No Mods" log at the bottom of additional information. Cheers guys, sort this, because we have asses to kick here :D