Game Closing During Ranked Battles

Is anyone else experiencing the issue where the game closes back to desktop during ranked matches?
I’ve lost double xp boosts, been banned and wasted a lot of time because of this!
It always seems to happen during ranked matches about 4/5ths of the way through, the game will just close without warning back to desktop. Not had this issue before.

PC:

Windows 11
16GB DDR4
GTX 1080
i7-10700k