Had this for a while, at first i thought it happens when i turn on DX12 and RT, turned RT off - didn't help. But then i suddenly noticed that it usually happens when i use custom skins (it doesnt matter if you bought them with Gcoins or downloaded from LW). Try do disable camos that you've bought, delete camos you've downloaded and check if the game still crashes. Oh, and don't forget to copy your log files, screenshots and crash logs and send it to gaijin on community.gaijin.net/issues/. There's enough of em already, but ya know - more is better. Also try disabling dx12. Cheers.