Fcn, fcn, fcn .... yes, I have new graphics drivers, win drivers ... all drivers, HW PC is oversized for this game, etc. But this error keeps happening when I play the game for a long time. Yes, that dungeon is hard for me to solo and that's why I have to play it for a long time. I want rank 11, I have to finish the dungeon solo without leaving the run ... but this fcn bug won't let me. Thank you Bungie for setting achievements to fail because of your mistake.