I found this shadow glitch in Enscape for Revit when walking through a model. Our whole project started flickering as we walk through the model.
I was able to recreate it in a new project with 2 walls and a floor and changing the time of day.
Also when I start to walk around the shadow flickers and moves around
The issue occurs in all Rendering Quality levels.
I haven't tested this in Sketchup or Rhino.