This is specifically on my smartphone (Samsung S7, Google Chrome).
My embedded model (here) is not in 3D (360° Images instead) as indicated on this snapshot.( Embedded with auto-start and turntable)
Using the same phone and Google Chrome, everything is fine on my Sketchfab account.
Still with the same phone but with Firefox, everything is fine also (except that there is no light as described in a previous post but that's another story).
Any advice from the staff ?