Same issue on iPhone 12 Pro Max (iOS 14.7.1) and iPad Pro 12.9 M1 (iPad OS 15.0 (19A5318f)).
I tried:
- Removed auto brightness
- Uninstalled Netflix and put it back again
- removed true tone
none worked.
While streaming only in cellular brightness was fine, the issue is limited on my devices while using WiFi only (internet link is 1Gbps up/down so is not that). I called Netflix and Apple, none of them where able to provide an answer how to solve it. Netflix said they raised a ticket…
Only thing that worked was to download the show on high resolution and then plays superb! so I wonder if on dolby vision / hdr shows it has issues to stream It at full brightnes? Youtube has no issues with this type of content!
old shows looked fine.