UPDATE:
1) You can try submitting this issue to Apple, but Apple will re-direct you to AMC+ Support. Even though the issue occurred simultaneously with an automatic update to TV OS 15.5.1—because it seems the issue only affects AMC+ app and not Netflix (for example), it is in their (AMC+) court...
2) So I have submitted a support request to AMC+. They're response:
- Standard acknowledgment email that they have opened a ticket, and
- Boilerplate email with basic troubleshooting info and requesting additional details.
I have responded with all the requested additional details, and a link to this discussion.
FYI for AdvisorMP (above) in my case:
- Not using it with a Smart TV
- Connected to TV via HDMI cable
- Only affects AMC+ (no other channels/apps)
- Acts like a DRM issue, but before the latest Apple TVOS update, everything worked fine. It's as if some internal DRM switch has been flipped somewhere by accident - triggering that blank video screen - even though the video in fact is NOT playing on AirPlay on any other device.
If you have this issue, please send an email to AMC + <customerservice@amcplus.com> and provide your details.
🤓 BTW: I can use the AMC+ App on my iPad and then AIRPLY it to my Apple TV 4k. Maybe I should just delete the app off the Apple TV and pretend it was never there?