Yes. I think too... this is C3 trouble...
You great man. Best regards!!!
Have you considered point light sources (no LightLayer3D) and working with shadows.
I remember the Q3D (banned by Scirra) on the C2. Point light sources worked very correctly there. You had to place them as a 3D model, adjusting the height... but they worked...
I can find
https://www.construct.net/en/free-online-games/animacion-reflejos-3d-30795/play