[CLIENT] Client uses 99% of GPU

I got myself a shiny new PC and started playing League with friends, yet there was something odd. Whenever I exited a match, it took maybe 25 Seconds for the client to stop responding entirely and taskmanager showing me that it was hogging 99% of my GPU. Later, after I just restarted my client after every match, it just occured after starting the client. Funnily enough, the sounds (like, the "accept your match" sound) were still playing just fine. Trying to close the window through taskmanager causes it to close for a second, then pop back up with a weird blue background that just has a loading bar and the league logo, which, at times, then gets back to the client itself. I am only able to close the client if I repeatedly click the "close window" button in my taskbar and then, after the client window disappears, kill the process itself. Of note, after killing the window like this, there is a (3) behind the entry for league in task manager, so my guess is that it opens copies of the client that then quickly clog up the VRAM? I don't know. I just hope you can help me with this.

My system consists of: -X570 TUF Gaming -Ryzen 5 3600 -RX 5700 -32 GB of RAM

Thanks for the help in advance.