Client stuck when any counter hits zero

I have been consistently running into a bug on PBE and live (NA) servers with multiple computers where when the countdown timer for anything (champ lock-ins, bans, etc.) hits zero, it stays there until the lobby closes and I get leaver penalties.

To recreate this bug:

• not sure how/why it started
• go into any game type where a timer hits zero before the game (not aram)
• wait until one of the numbers hits zero

Can't really play anything but ARAM until this is fixed...