Issue rendering with RPR in Blender 2.8.75.
ProRender ver 2.0.112
I have no idea what other information I can/should supply.
I made no changes to the settings at first but did start making changes in settings
without success of fixing this issue.
As you can see in the images below, the world background (HDRI) is covering the model.
This happens while rendering and viewport rendering.
This also happens when not using an image for the background.
Here is an incomplete render showing how the model starts getting covered up with the background.
If I let the render complete, the entire model gradually gets covered up.