Unusual Black Screen Bug

I'm in a game right now and this happened. During the match, I started lagging, so I hit alt tab. It uusually takes a few seconds for my computer to alt tav out but this time it didnt do it at all. I wven tried to open uo command pronpt because that helps sometimes when it takes too long.

This time it didnt help. My game is stuck on a black screen. All I see is the league cursor. I cant hear myself sending messages in chat yet i can hear others, I can hear pings, recalls, my character, cast skills, turret shots, and hear the announcer calls.

I doubt anyone else has ran into this bug, but if so can Riot make a fix for this?

On a different topic, is there a way to fox the random bugsplat or firewall errors that happen in the laading screen along with being stuck on the loasing screen? I have seen multiple threads about them but thebriot suggested help never works when the person tries it out.

Accidently put this in the story boards 2 days ago.