Hey all,
I know there was a discussion about this at some point and I apologize in advance if this will turn out to be another “answered many times before” thread, but I've searched to no concluding answer.
I've opened an older scene in .5.560 (but still created with 16.5.) and after a few camera changes and renderings, my model turned black in the viewport (VP).
What gives?

Does it get “fixed” when you toggle between different viewport shading modes (Headlight Only, Normal Lighting, High Quality Lighting, etc)?

If I enable Headlight Only it'll display OK, but going back to Normal Lighting will still display black.