Game freezes on champ select in One for All and Aram

Hello, this has been happening a lot recently. I chose a champ, but when the game picked someone on random in All for One, the game froze and I couldn't do anything. Sometimes it unfreezes when the game starts, sometimes I have to relog. This happens in aram a lot, too. The image shows the frozen game, I know there's not much to see, but eh, maybe it will help. This does never happen in any blindpick or rankeds or TT. Thanks for any help.