Dolby Vision content displaying distorted since tvOS 12.4 update.

Dolby did roll out a firmware update this year to fix some issues with brightening of black bands in letterbox format amongst other issues. I read that after the update some early Dolby compatible TVs wouldn’t be supported any more due to earlier TVs hardware limitations. I didn’t believe mine was one of the obsolete TVs until now, it was only 2016. But I got a free 5 year warranty which I believe should cover this as its one of the main features now disabled.

I have also seen it in the Ranch series, in lost in space, in Predator in Netflix on Apple TV. No problem on my tv’s Netflix app (however I notice sometimes drastic change in brightness in a scene dependable on the change of light in the scene, which to my opinion is unnatural). Is it because my TV an LG UH850V is an older model with a hardware chip from Dolby that handles Dolby vision and not software handling like in the newer models? They break compatibility I think with an update, that’s why older TVs are not compatible (for Dolby vision only) on the Xbox one X also.

I was also able to pause my Apple TV on a scene with a raised black/color error, unplug and plug back in the HDMI cable from back of the Apple TV device and it did fix the problem until I changed content or tried playing the same scene again. I also tried a another certified cable and different HDMI ports on the TV and got the same behavior.

Interesting, but what does it mean?

I have a 2018 TCL 5 Series and get the same issue. I have the Apple Tv 4k connected to an Onkyo Dolby Vision compatible receiver.

I do not get these issues in the built in TCL Apps or Apple TV's Vudu App, I mainly started noticing it when I attempted to watch SEE, and it's happening in "For All Mankind" too

Thought my tv was breaking, glad I'm not the only one getting the issue.

I’m also experiencing this on my 2018 Vizio P Series(P65-F1). Also agree it is happening in dark scenes for the most part. Mostly on For all Mankind and Apple TV+ shows. Have not seen this on Netflix watching DV content.

I don't believe Airplay will send Dolby Vision so that's why you're not seeing any issue. If you turn off match content on your apple tv in the video settings and switch to 4K SDR, you would likely not see the issues presented in this thread either.

I also only have the problem with Dolby Vision content from Apple through Apple TV as well although some are seeing issues in the Netflix app on ATV as well.

I have a new 2019 TCL 55R625 TV that supports Dolby Vision at 60hz—and it looks great, much better than standard HDR in most scenes except when it suddenly fails in dark scenes. I wish the TCL TV had a better HDR implementation but it’s about twice as dark as Dolby Vision crushing all dark details no matter the settings.

So the SDR with Match Range isn’t a solution for me, and even with that setting it still has the same problems with Dolby Vision dark scene content. The attached screen cap is from a low light scene in The Morning Show from Apple.

Watching Truth Be Told today and have noticed a few of the issues in the first episode that have been discussed in this thread. It’s a pretty dark show so maybe that is a contributing factor. The murder scene in the first episode had some pretty noticeable issues on my set. Perhaps these episodes do not have the same encoding fix that the other ATV+ episodes have.

I think this issue was originally related to Dolby Vision display errors with AppleTV4K devices.

I don’t believe any implementation of the Apple TV+ app running on Roku or other TVs support Dolby Vision playback, but let me know if that has changed.

I have a Roku TCL 6 series TV 55R625 with software 9.2.2 and Apple+ or movie Dolby Vision content hosted by Apple still has problems with certain low light scene content.

I have feeling it won’t be fixed until new versions of these movies are re-encoded and re-uploaded to Apple’s servers with new Dolby Vision profiles applied.

I’m not convinced it’s an issue with Apple TV 4K any longer. When I unplug my HDMI cable with a bad Dolby vision image on screen, then plug back in or into another HDMI port, the image is no longer distorted.

Unfortunately this ‘fix’ doesn’t stick.

Just bought an Apple 4k TV to go with my new Sony Str dn 1080 Atmos receiver, as iTunes has the most Atmos content. Unfortunately I have the exact same issue as you guys on my Sony A8F DV certified TV. Have isolated all possibke causes - it's definitely the Apple 4k TV...

I ran another test and I do get the DV logo after reseating the cable. I have new Cable Matters 3’ Certified 8K 120hz cables arriving today which should be overkill and rule out any cable issue. I’ll report back. This example is from a night scene in Once Upon a Time... In Hollywood which I purchased from Apple Movies.

I just tried new Cable Matters 8K 120hz HDMI cables and the issue is the same. This isn’t a cable issue and I’m tired of spending money troubleshooting something Apple should have fixed or at least clarified by now.

I had the same problem with the Dolby Vision iTunes copy of Once Upon Time in Hollywood as posted previously. Dark scenes throughout would bloom off and on and it became unwatchable, so I had to finish by watching the Blu-ray. It even happens at the beginning of Apple's own Morning Show -- it became so annoying that I just turned it off. I thought it might be my new TV, which supports DV, but apparently not. I have have had no issues with DV in Netflix and Disney+, so it has to be an Apple issue. Severely disappointing.

Yes. Apple all but admitted it was 100% related to its firmware update. It has to be. My fire TV displays and native TV apps display Dolby Vision just fine. I’m not sure what Apple Is doing with their Dolby Vision, but it is a bit frustrating that a $35 dollar Amazon dongle works perfectly and the $180 ATV is buggy. If I didn’t own so much iTunes content I’d just use the Fire TV and my problem would be solved.