I didn't read all of this thread, but I'm having an "issue" with my 2080, which overall, I have really liked. I added HBO Max this past weekend, and had heard that Wonder Woman:1984 was in 4k, but it only shows up as HD in the menu. Had an issue with hulu when we first got it, wanted to play at a lower resolution on auto, wondered if that was an issue here. So started playing around with menu, in both my Roku and the Yamaha.
After playing around, I noticed it said neo 6 cinema, or something like that, and when turning off the ai feature, it went to pcm on the display. Normally, with ai turned on, that's all that displays on the front panel. I either pushed the right buttons, or it went back to it's normal operation on it's own, until the other day when it did it again. I did notice that the only thing I had been playing with before that, was I had hit the display button to bring up the info screens. Also, when switching sources, the first thing that comes up is decoder off, although I don't know if that's just between the switches until it figures out what it needs to use.
Now the weird part. Decided to watch a bit of Rise of Skywalker before going to bed on Disney+, and at least on that stream, the display now said Atmos and DD+ I believe, with ai icon lit up in the far left corner. Am I missing a setting somewhere? Was a there a firmware update recently? It has never shown me what format was playing before, would much rather have that than AI or surround sound, but I don't what to change. This also did this with my sony uhd player, although I didn't try a disk to see what would come up. Thanks for the answers if you have any.