Client Freezes During Ban Phase

In case it hasn't been reported, yesterday I noticed in 3 or 4 matches that when I was supposed to ban, the client froze and assigned me "no ban." Didn't change much, but I wanted to mention it. Based on what I saw at the time, my suspicion was that it was occurring becuase someone on the enemy team was also banning the same champ.

I'm guessing this because if I opened with a ban selection of an obscure champ, it didn't occur.