I "upgraded" from a Premiere+ (maybe 3 years old?) to a 2020 Ultra , because - DolbyVision.. Absolutely nothing else was changed, just a plug and play swap. Premiere+ worked just fine. Ultra gets HDCP 020 errors several times per hour (does recover after about 10 seconds of a notification screen). Happens even when the content is paused, and not DolbyVision. Happens on any "channel." Extremely annoying, and definitely customer hostile - pirates know how to get around copy protection, but I, paying for content, have to deal with this when simply watching.
Roku, get your sh*t together and fix it. I'm happy with the UI, which is why I stuck with you, but I'll soon be exploring alternatives, because your top-of-the-line box simply isn't ready for Prime Time.
Newly noticed: it even happens on the Roku screen saver (the Roku logos which drop down when pausing content for a while). Why TF is that even subject to content protection? Roku, this is customer hostile.
I had the occasional HDCP error on the new Roku Ultra, very frustrating. I have an LG OLED 4K TV, Yamaha AVR, and brand new AudioQuest HDMI cables (18Gbps), all support HDCP 2.2. Called Roku support and worked with them two different times, having to go through all the troubleshooting steps. Nothing we did fixed the issue. I keep seeing this problem all over the Internet so it seems to be a hardware issue with the Roku itself, IMO. Especially since my 4K Blu-Ray never has an issue. I gave up and returned and got a 4K Apple TV in January. It's played 4K content beautifully since, no issue.
I am using a 1 meter Zeskit Maya Ultra High Speed Certified HDMI cable and still get the stupid HDCP error several times an hour. Roku has NOT done anything to fix the problem. Never get this error on my Apple TV4K so I think I am just going to throw away the Roku streamer on my second TV and replace it with another Apple.