I don't know if anyone has tried this, but it "works"... As previously mentioned, transferring the 4KUHD recordings to an EHD allows them to be seen on the 4K Joey. So I started the Ski Jump presentation from Sunday 2.18 and got the 1540 notice. Instead of saying OK or Cancelling, I pressed Menu twice so I could check the MOCA stats. The program continued on in the background while I was poking around in the Menu system. When I exited the Menu screens, I was watching the Men's Large Hill ski jump with no pop-up box. The colors are washed out, but that's to be expected on my 1080p, non-HDR Sony Bravia.
I can confirm this works....
H3 connected to 1080tv,
Set timer to record 4K olympics,
Play recorded dvr 4K program,
Get program with error box,
Press menu button on remote,
Program thumbnails to top-right of menu screen without error message,
Press cancel button on remote,
Program goes to full screen without error message.
Adjust tv bright level down just a bit.
Nice to see Olympics (even in 1080i) without all the compression.
The hardware CAN play the programming,
And should not be artificially software blocked.