Unusual problem cropped up watching a recording of The Simpsons on Sunday. It LOOKED like the show was being viewed with a 1 or 2 Mbps bandwidth. Lots of micro-blocking around the lines. Even a very low transmission rate is fine for animated shows since they utilize very simple graphics, but this was pretty bad.
I was about to fire off a tersely-worded message to the station when I thought, "hey, I could check my backup recording that used WMC!" Sure enough, the picture was almost pristine. Very close to the picture you'd get streamed straight from the FOX app. Sharp lines, solid colors, just a tiny amount of micro-blocking you had to squint to see.
Last week the picture looked fine. The one major change I made this week was to revert from the latest Fire TV Cube back to the Fire TV Max due to a bug in the Cube. The picture also looks fine on my phone and my other TV - a 48" TV in bedroom that uses a Fire TV 4K.
I re-installed ChannelsDVR.
Anyone else experiencing this? It's less apparent on non-animation, but it's there.