[CLIENT] "Ready" button active when not enought players in team builder

Steps i did for this to happen:

1. Enter in the game room
2. Waited for 5th player to join. As soon as he did i clicked "ready"
3. The player left 1-2 sec after that and the button remained active.

When i click the button it plays the sound of clicking. (nothing else is changed) After a few minutes when 5th player joined again all went normally and the game started.