Same thing is happening to me since at least a week ago. Over the course of the game the VRAM gets used up and frames drop to around 10-15. I'm also on Linux
I had the same thing happen to a teammate who was playing sinclair, after stealing the viktor ult he became invisible. I also used the attach ability on him as rem by accident and it seemed to have crashed my game, after which it crashed 2 more times upon launch. Match id: 52808292
