There seems to be a grave bug with CinemaDNG footage from the (original 1080p) Pocket Cinema Camera in Resolve Studio 15.1.0.024 (Windows version tested) when Color Science Version 4 + Highlight Recovery are activated in the Camera Raw tab.
Both in timeline playback and in rendered videos, crosshair artefacts appear alternatingly with large black squares in the regions where highlights should be recovered. I'm attaching a few screengrabs from a rendered video to illustrate what I am referring to.