I don't see a 1080 downconvert from my DNxIO. The Blackmagic control panel has 1080 selected as the output. If I change the project to 1080, I see the output. Of course that is useless as I need to work in 4K and changing back and forth undrenders everything.
Doesn't work with Ultra HD either.
First time I am trying this on DNxIO. It worked with Nitris DX.