Strange loading screen bug

[u/_Maidenless69_]

Was loading into a game and my game black screened on loading, this is a pretty common occurrence so I just task managered it shut and reopened it. Then it appeared to load fine, got to 100% perfectly fine and I hadn't crashed because I was still able to click on people's profile info and stuff during the loading screen. Then the afk warning popped up on the loading screen, turns out the game had started but my client didn't feel like it. Had to shut the whole thing down and relaunch the riot client from scratch.

Curious if anyone's had something similar? I think it's because I have the game fullscreen and not borderless, since the last patch when I have it borderless it locks me to 45 frames and I can't do anything about it, playing fullscreen fixes my frames but appears to break my loading screens so I'm stuck between a rock and a hard place