Loading screen freezes when everyone hits 100%

Basically title. This isn't a consistent bug, and it happens to be about 1 in every 10 games I play. This still happens even when I turn off background affiliated programs like LoLRecorder.

Everyone will load like normal, and nothing will seem wrong. But when everyone hits 100%, it won't get into game. It'll just stay in the loading screen. To fix this I have to exit the client, and re-log, and retry loading until it stops giving me an "unable to connect" error.

This bug has yet to cost me majorly in a match (the latest I end up joining a game is about a minute in because I've picked up on this bug fast), but I feel somewhat uncomfortable joining ranked queues in case this costs us something.