Games appear to randomly close/crash

I've had two random crashes happen in games I've been playing (ARAM). I'm just playing as normal and the game client suddenly closes, with no crash or error message in response. Logs attached if they help

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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