Have others been able to successfully get their HD621 to work with 2160p@30 ?

My X85 UHD Sony linked to a Beelink via an HD621 will only show 2160p with artifacts. When connected directly to the TV it works fine.

I will check but pretty sure my HD621 runs latest firmware.

Of course it is not formally supported, but it would be nice if it would work (as reported here).

Meridian G68 AXV, HD621 | Cinepro 2k6mk5 | 4x Scanspeak A4 monitors, center & 26W Sub | RPi Hifiberry digi+ | Roon