DeckLink 4K Pro 12G‑SDI wrong colors

Hello

We are using DeckLink 4K Pro 12G‑SDI, when I run the Testpattern application for 4k (2160p) output mode i get wrong color bar. Please see the attached image for this. If run the same card in HD(1080p) mode color bars are ok. Any idea why I am getting the wrong colors

What is your monitor?
How do you feed signal?
Maybe it's 4:4:4 v 4:2:2 (monitor is not getting 4:4:4, but it think it's).

Monitor is Blackmagic Smart Videohub, i am just running your test app which is testpattern
as ./Testpattern -d 0 -m 22

So this is between 2 BM devices.
I don't know this app.
What if you send footage with eg. MediaExpress?