Black Screen Client

Occasionally when I solo r play with a party, when we accept a match, I get a black screen not allowing me to go to champ select. I don't like that this is happening because of the temporary punishments for leaving the lobby. I don't want it to end up happening to where I can't play anymore.

Other times I just get champion ability info blocking the chat box so I can't call a role or see what others are saying. Please fix