Same issue here except it started today. played fine yesterday.
I fixed it myself, a file from the game named Cas_16 or something and it almost damaged my disk as the file is corrupted but the steam repair doesn't consider it broken, until i brought a different disk and try to move the game but every time that specific file blocks the whole moving so I skipped it (I press skip on that file) and repaired it from steam in the new SSD so basically downloading it again. Then I removed the old bf6 folder from my SSD (the one with damaged file that the pc and steam don't know about it being damaged), and then I played my game normally.
After that, I even moved everything back to my original SSD with that new "Cas_16" file which is not corrupted and it's movable now and the game worked fine with no crushes even on my old SSD. So it was something from the game files that almost broke my SSD and crashes the game, also the crush or the damaged file might be related to ea-anticheat scanning the game files mid game and not approving on the game own files somehow which then damages it.
