[CLIENT] Matchmaking in teambuilder seems to search a game for a long time, actual game started

This happened to me yesterday, I was matched with a team in Team Builder, and then we started to look for a match. I waited for 8 minutes in the queue, during which I wrote messages in the team builder chat but got no response, I wanted to leave the queue but received warnings that "Leaving the queue may result in consequences if this behaviour repeats" - eventually I gave up and left the queue. To my surprise, when I wanted to re-queue it told me I was already in a game. I had to quit the client and log in again to get the "Reconnect to a game" screen. The game was 8 minutes in when I joined. I have no idea how to reproduce this bug, but when I've wrote to players in game they told me it happened to them once too.