OK riot , wtf is this BUGGGGG

Everytime after a game , my launcher is almost all black , i cant see some partos of this launcher. When i dont see the right side , when i press chat , after that i can see the right side,but not full right side . Now i rerolled a champ in ARAM cuz i didnt see the middle part of the launcher. I was hoping that this will be only for 1-2 times , but it is always
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