New LG CX OLED with flashing line at bottom of screen when watching content on inbuilt Apple TV app

I'm convinced this is an LG issue, not an Apple issue. It was occurring on both my Plex app and my Apple TV app. I found a setting under the Aspect Ratio Settings that even reads "if the edge of the screen is not clean please turn this feature off". It's the "Just Scan" setting.

I'll tell you what fixed this issue for me. I had this occurring on certain movies on both the Apple TV, and the Plex app. Not all of movies, only some of them. It drove me crazy. Anyway because multiple apps were affected, it proved to me it was a TV problem, not an individual app problem. I finally found the setting on the TV that got rid of the flashing line at the bottom of cropped movies. It's called Screen Shift. Screen Shift must be turned on. It's located under Settings, Picture, Additional Settings, OLED Panel Settings, Screen Shift. I hope this helps you guys. I went through pretty much all of the settings before discovering this.

My solution in the end was to ditch the LG operating system (was experiencing Atmos drop outs too) and buy a Amazon Fire Cube.

For £109 it was well worth it as can now use the AppleTV app on that without issue, alongside all the other functionality it offers. I did originally buy a AppleTV 4K, but returned it after realising it doesn’t support Dolby Vision / HDR on Prime and Disney+ (only it’s own Apple content and Netflix).

Not really a full solution I know, but for what it’s worth I no longer have the issue.

Yes I’ve noticed the vertical stretching since the last update - happens on See too, alongside AppleTV+ trailers / ads before you watch a new series.

I find simply exiting, then going back in fixes it temporarily (don’t need to adjust any settings).

The implementation of the AppleTV app on LG Oleds just seems riddled with bugs, though oddly works fine about 50% of the time.

My strategy now is if I use AppleTV, try the LG app in the first instance and hope for the best. If I’m getting issues, then switch to the AppleTV 4K and just put up with any raised black levels which seems more of an issue on Netflix than on AppleTV content. I don’t no why this is, or whether I’m mistaken.

As a side note, going back to See on AppleTV, I notice the flashing line on the first episode, but not the last - is bizarre.

My Apple TV app on my 65C9 received an update last night, and now my Aspect Ratio Settings are greyed out when running the Apple TV app, and the flashing line issue is gone!

Anyone else receive this same update / see the same results?

MrJay30,

Apple is not going to read this thread. I know this, because they told me so themselves when I wanted to point them to it to show them how many of us are complaining about the issue.

You need to do your own due diligence and call them. I spent hours of my life reporting this. Sending them data etc. The result was the CX getting fixed and not the C9. I encourage you to please call this in on your own time.

thanks so much tb-123!.. this issue has been driving me crazy since I installed apple Tv on my OLED..I checked Just Scan and it seems to eliminate the problem!

I dont have a patience for those so called technicians so I got myself an Apple 4K TV and there are no issues now.. maybe that is their marketing point.. lets put some unfixable errors so people can spend $200 on our proper item.

Just adding another voice that I am seeing the same issue with Apple TV app on my LG C9 OLED. A white flashing line on the screen along the very bottom row of pixels. The first movie I thought it was a problem with that particular movie, but then it happened with a second movie last night. I turned 'just scan' off to stop it showing, but yes this is a band-aid fix which crops the picture a little bit on all sides.... hopefully Apple can investigate and fix the issue with the Apple TV app on LG webOS

I just wanted to update you all that I opened another case with Apple support and this time I think we are going to get somewhere!!

I spoke to a gentleman named Scott who is a senior level engineer. He asked me to take several clips of the phenomenon (the flashing line). And I submitted the files to him. He’s going to work with LG and other engineers and will be giving me a follow up call in five days.

fingers crossed this will lead to a permanent fix. Because they just updated the app with Dolby Atmos surround sound so if they could just fix this problem the app will be perfect

If this only happens with this particular title, then it might be an issue with the source file. Then you can report it as a problem with your purchase.

Unfortunately, you are wrong. The Apple TV 4K box has an issue two issues in fact. One specifically for LGC9 and CX models..... Stop reading now if you don’t want a headache Lol!!

The problem with the Apple TV box with an LGC9 or CX model is you get raised black levels when watching Dolby Vision content. You have to lower your brightness down to 49 or 48 however, by doing this you do lose a bit of shadow detail. The other problem that’s universal for all TVs is that the Apple TV 4K box does not produce 24P correctly.

using the internal Apple TV app solves all those problems however you now get a flashing line! lol it’s crazy I know.