When I'm trying to use Viewport shading on Mac Pro (2019) with non-XMP (non Apple) graphic card selected as render device objects dissaper. They present in viewport and can be selected but no proper shading/lights. Just the selection outline.
If I change render device to CPU or Apple XMP module everything's fine.
Usual render (F12) works as intended on 5700 XT as well as 580 based XMP module.
P.S.: Worth mentioning that if I'm trying to render while both card are selected as render devices render looks strange - different part of the image have slightly different colors/brightness.
I'm using Catalina 10.15.4 (it was the same on 10.15.3).
I'm using newest publicly available version of Radeon ProRender - 2.3 with Blender.
Non-XMP video card is AMD Radeon 5700 XT (Asus one, but probably not related).
I have attached video that briefly shows the situation.
I can collect any logs/diagnostics if you need them. Just tell me what and how to gather.