[GAMEPLAY] Fog of war appears to be lifted where it shouldn't, can't see in it regardless.

I connected mid game (~1:30), due to some issue that's been occurring lately (not the purpose of post). And initially I didn't realize (due to having a tower and allies there at the time), but later I confirmed that a portion of the map appeared as revealed. The area that appears revealed does not in fact allow you to see in to it. It persisted the whole match.

How it occurred, after champ select the loading client never opened. I realized this a couple minutes after champ select and found the process that was supposed to open, end tasked it, and re launched the game through the client. I was playing as Rek'Sai, and the vision bug was there the whole match.

I'm quite certain this has happened one or two times before, and I can't confirm any surrounding circumstances, nor did I document the problem.