bcoak

After the latest update,  05.10.15, I’ve  have most functionality back most of the time. However, occasionally  Apple TV 4K looses Dolby Vision, I’m also seeing white lines through picture occasionally.  Denon 3400h, LGC9, ATV 4K. 

On 6/19/2021 at 10:13 AM, Gfeltner78 said:

Same issue, but an interesting wrinkle with mine.  LG C9, same update as everyone and Dolby Vision is broken between my Apple TV 4K and Denon AVR.

what is interesting is Dolby Vision runs just fine between my Sony UHD player running through the same Denon to the same TV.  

So it has to be something specific to the LG and the Apple TV 4K (I have the 2021 Apple TV 4K by the way).

I have the the same setup.  Screen flickers on and off every second or two. I was able to stumble through the Apple TV settings and change video to 4k HDR, picture is back but I notice the difference in quality for sure. 

Same here. LG TV updated then my 2021 Apple TV 4K stopped displaying Dolby, flashing the screen on and black over and over,  had to revert to 4k HDR.