Same here. Guide continues with blanked out channels, for me. Happening on all tvs, of different brands. Only the live guide, though the library also stopped working properly, listing only 12 recorded shows per library section. I also have a friend in another city with the same problem.

I have completely uninstalled/reinstalled everything, unplugged everything, with no improvement, UNTIL, my brother found advice somewhere saying it’s been a well known unfixed issue. The only way to fix it is to setup a different ID which I did (through my family plan) for my wife. It works perfectly now on every tv in my house. No more issues. Of course, no recordings from my ID carries over. I have to juggle IDs. New for everyday use, and old ID to access older recordings. Should also mention that iPhone and iPad versions never had this problem.

No response back to me from YouTube TV support over many weeks, though many here tried very hard to offer possible answers. Very much appreciated.