[GAMEPLAY] Game client crashes every couple of seconds in certain games

Last night, I entered a game and experienced a crash within 30 seconds of loading. The time it took to crash was random; one time, it crashed within 10 seconds of loading. I reconnected six times before I gave up and stopped trying.

I reinstalled the game, just in case, and played a game without experiencing any crash.

Earlier this morning, I played a game as Kayle, and again no crash. I went directly into a second game, also as Kayle, and the crashing was back. I crashed three times within seconds of loading, and then the game was remade.

The crash dialog I'm getting isn't the normal one with the option to make a dump. It says something about a critical error and suggests disabling streaming software (which I'm not running), so this seems like it might be an issue with the anti-cheat system? In the case of the crashes today, there was no change in the software running on my machine between the first and second game.

When I looked at the game logs, they're cut off mid-line around the same place each time (listing the same player's runes) and there isn't anything that looks concerning. Unfortunately, I tried reinstalling again and it wiped the logs.

Has anyone else experienced this?