Roku Ultra 2020, aka 4800x, direct play, colors distorted when playing back HEVC, 1080p content on 1080p screen. Applies to both 8-bit and 10-bit packaging of 8-bit content

[ljunkie]

This has also been reported on the Roku forums.

It seems the Roku Ultra 4800 definitely has some quirks that previous generation didn’t. This issue can be seen outside of the Plex channel too. We will file a report with Roku.