Each light add addtitional texture slot to the material, some of the PC|devices to allow to use a lot of textures on the material (some of them not more than 8 or less). If material has more than maximum textures that allow your device it will disappear.
Co-founder and lead graphics specialist at Soft8Soft.
usually I don’t use blender, but to be able to use verge.
I import the objects. first i replaced the obj objects in fbx. I noticed that fbxs are handled better by verge.
then I had other objects ignored by verge. Basically, I had a cube and I pierced it with a cylinder. I had to divide the face of the cube into which the cylinder enters into triangles, otherwise it was invisible. Always using fbx objects, as with obj you could see the polygons.