UI & Tile-Affecting Visual Bug, Disappeared After Re-Launch, Possibly Caused by CPU

Assumed Cause - Black-Out Causing Corruption

Earlier today, laptop had a "black-out". Screen went black while playing the game, with some other apps open in the background. All I could do was press buttons to hear several beeps. Had to force-shut it down to fix it. A quick bit of research tells me it was a CPU problem, which seems likely considering the age of my device. Assuming my outdated & damaged CPU is now having an effect on the game.

Bug Discovery

Launched Minecraft for the first time after the "black-out". Entered a world, was presented with certain blocks having static-like faces. Did not affect entities or tile-entities, however. Opened my inventory & went into the search bar, looked up "Pig" & found that spawn eggs were affected too. Not sure if other items are affected.

Assumed it was a resource pack problem & turned off the only one I had on. If anything, it made the problem worse. Every tile, even those underwater, was now affected. As I placed/removed blocks, the static faces changed.

Was told to re-launch the game, which actually worked. Although, it could always came back in a certain launch of the game again.

My Assumptions

Could be a genuine visual bug. Could also be a form of corruption from the black-out I had. It could also just be a sign that my CPU has reached the end of its days.

TL;DR

• Had a black-out today, might have caused corruption

• Launched game, found static-y visual bug, only affected certain things & changed in certain conditions

• Re-launched game, problem solved, could come back again