Apple Tv 4K playback quality low
Playback of content via Apple Tv+ on my Apple Tv 4K device is frequently bad. It may start streaming at 4k but then will soon drop down to SD (480p or similar) and be almost unwatchable. It will go back and forth switching resolutions as it plays but never managing to stay in HD or 4K for long.
The Apple Tv 4k is connected via ethernet, but switching to Wifi is just as bad).
Naturally, I checked my internet connection (I'm on fibre to the house and get between ~500mpbs down and ~100mbps up speeds) tried restarting all devices (router etc), making sure firmware was up date etc etc. All good. I can stream content on this device from other streaming services (Netflix, Disney+ etc) and over my local network in 4k with no issue at all. The network and internet speeds are not the problem either.
The issue would appear to be with something Apple Tv+ is doing. Has anyone managed to actually solve this?
Apple TV 4K, tvOS 26