Transparent dots on edges on iOs

I have faced with some visual problem that is actual only for iOs platform. On other pltaforms (Windows, Mac, Android) all is ok. Model has not any texture applied to it’s material. Look at screenshot below:

This lamp has a grid, so I think this dots appier on grid edges. Does somebody know how to resolve this?

Those appear to be specular highlights. Try applying a material with the shininess and metallic/specular set to zero and see if it appears.