@Riot - Dynamic Ranked queue bug!
Bug description: After you set your two roles and click "queue up", you immediately receive the "Ready to play?" message (less than a split second after queuing up). Once you proceed to champion select screen and everyone has locked in their champion, your client freezes when the timer goes to 0. I had to exit out of the game and logged back in to get a dodge. Has occured twice to me this week and I've confirmed that it is not a connection issue.
Temporary solution: I found that declining the afk check saves you from this problem. If you get an extremely fast queue, you may have this issue.
I queue'd up alone for both occurrences. Anyone else have this problem?