Client freezes when match found and clicking on store at same time.

While waiting on a match, I was double-checking the price of a champ in the store. When I hit the store button the match was found at the same time. The screen then froze for about a minute. I was then in champ select with 90 seconds, everyone else was locked in with champs, and then I was kicked out with a 5 minute timer for not picking a champ.