See guys, I'm not crazy. Well, I'm not wrong about this receiver's issues anyway. Yes, the blackout screen is an annoyance. But, I figured a few more things out. First, I was wrong to say I turned off HDR in my TV. Actually, the setting is for UHD color. Turn it off, and no more HDR. However, you also clip your colors all the way around. So, I turned UHD Color back on in the TV but left HDR off in the Apple TV 4K and Sony UBP-X800. Now, the Apple TV 4K can send 4:4:4 and is not locked to 4:2:0. I also set it to match frame rate but NOT dynamic range as this will activate HDR in content that has it. I matched the range because the Apple TV cannot send out 50hz material out without issue through the Yamaha. Watching "The Great British Baking Show" I noticed some strange stuttering of the picture. I applied some motion interpolation on the TV. Nope, worse. I tried sending everything out at 50hz. The show looked great but everything else developed the stuttering issue and I simply reversed the problem. So, I matched the frame rate. This results in a blackout screen when changing from 24fps material but this is not uncommon for any device and is supposed to be dealt with when QMS comes online with a future firmware update. Now everything looks fine after a brief blackout when 24fps material is displayed. Oh, there is still the Apple TV 4K's 24fps "skip". That is Apple's problem. Now, for the audio. Yikes! I was having a hell of and time with audio from the Apple TV 4K. I'd switch from one app to another and my audio would be gone. Changing to Pure Direct and back on the Yamaha would fix it. But, it would be an issue again and again. Looking at the audio input signal on the Yamaha's GUI, it displayed "ATMOS/PCM" as the format. But, the channel input showed " - - - " and channel output showed "5.1" as I am currently using a 5.1 setup. I found that the Yamaha has an issue with Netflix from my Apple TV 4K in that it thinks for just a split second that it is not an ATMOS/PCM signal but rather a DTS-HD signal as that is what it displayed first and then quickly changes to ATMOS/PCM. It also disabled the ability to use Dolby Surround and I could only select from STRAIGHT, DTS Neural:X and DTS Neo:6. I finally went into the Apple TV 4K menus and set it to ignore ATMOS but I did NOT set it to change format. This resulted in a reset of some settings and HDR was activated so I had to go back and turn that off. Now, instead of an input channel label of " - - - ", I now have a label of "3/4/0.1" when watching Dolby Atmos labeled material on Netflix and my audio problems are gone. So, at least for my setup, the optimal settings for my Apple TV 4K through the Yamaha TSR-700 are 4K SDR, Match Frame Rate, Ignore ATMOS and do NOT change audio format. Turning on 4K upscaling in the receiver keeps the blackouts from happening when activating the GUI while watching the Apple TV 4K. It worked for me anyway. However, sorting out the Apple TV 4K did nothing for my TiVo as the 4K upscaling stopped working there and the GUI blackouts come and go. UGHH! Using different devices hooked up to the Yamaha and sending that info out to different TVs will result in different issues for different folks. I'm using a 2017 Samsung TV. I really hope somebody at Yamaha is taking notes and these issues are addressed when they roll out future firmware. In the meantime I am very frustrated but am also having lots of fun. So, there you go.