[CLIENT] Spectating a Tournament Champ Select shows black screen

Hi, I am hosting a tournament and am regularly streaming some of the games. I have then noticed a bug when I was about to jump into a game: If the game was not ingame yet (with the 3 minute delay), you would expect to see the champ-select-lobby. Yet, if it was not the first game, I did only see a black window. Expecting it to be some kind of client error, I reinstalled LoL, and recently heard a friend with the same issue. I should add, that this happened specifically to our Tournament-Lobbys. I haven't tested it on normal games yet.

Steps to reproduce issue:

1. Spectate/Play a game.
2. Follow a friend into another game, which has not yet reached the 3 minutes playtime.
3. See a black screen instead of the lobby.

Reproduction rate: 9/10

Best Regards, Dennlinger