Apple TV Streaming Quality Drops After 20–40 Minutes

Hello,

I am having a problem with streaming quality on Apple TV 4K (3rd generation) and would like your help.

When I watch movies, the video quality is good at first, but after about 20–40 minutes the quality drops significantly. On my big TV screen, the picture becomes very poor.

What I have already checked:

• I changed internet providers, but the same problem happens.
• I have fiber optic internet with 500 Mbps download / 500 Mbps upload.
• I enabled the developer tools and I can see the streaming bitrate dropping to around 6 Mbps, and sometimes even 2 Mbps.
• If I change something during playback (for example, the movie language/audio track), the quality becomes good again and the bitrate returns to more than 17 Mbps, but only for another 20–40 minutes.

I also checked the Apple TV system logs and saw an error related to memory. I have already sent a report to Apple.

I have three questions:

1. Can you help me diagnose and fix this streaming quality problem?
2. Does Apple have any bandwidth quota / bandwidth limit for Apple TV streaming that could affect quality during longer playback?
3. In the developer options, the displayed time seems incorrect. How can I change/correct the time there?

Thank you for your support.

Best regards,

RR