Client freezes at end of champ select [CLIENT]

For the past couple days, I've encountered this bug in the majority of games i've tried to enter. After champ select is over and the game is supposed to launch, the client just breaks. I get the rainbow wheel (im on mac), and the client fails to respond. This forces me to force quit it and reopen the client to reconnect to the game, which did start. This has resulted in me being about 3-5 minutes late to about 7/9 of my last games.

Steps to reproduce would just be entering a game. (I've only played in draft mode, so it may be exclusive to this mode, I'll update later with details about blind pick.) Anyway, this bug has been pretty infuriating since it popped up, and I hope it gets solved.

• EDIT I have now tried and confirmed that this bug occurs in blind pick as well. I pretty much have to stop playing league until this bug is fixed. This is making my games really frustrating.