Have you checked to see if Adaptive Brightness is on? Mine got turned on out of nowhere a few days ago. Not sure if it was the update reverting to default settings or I somehow turned it on.

Woah there, buddy. I get aroused thinking by my library all the time but I don’t go posting about it!

One thing I’ve learned after untold years of eBaying crap I don’t need: Just 'cause something is listed for a price does not mean it is worth that price, or will ever sell. :p Even sold listing prices can’t be trusted, tbh. People try to manipulate the market all the time. It doesn’t work.