Thank you @Amanda.Schade , I see it! 
EDIT: Oh! I have found a much more easier way to reproduce the issue, and native in 5.2! Hope it helps:
Please! If you could slightly look at those other ray-tracing-shadows related bugs, I would be very happy. Super easy to reproduce the steps, if you have interest. 5-10 minutes testing.
And please, (please!) moving assets (in the correct way, of course) inside Unreal is broken since many versions ago. How’s possible? A so elemental and must-have feature 
. Super Easy to reproduce too, just following the video provided and the provided project too. 1 minute testing:
Thaaaaank you very much!