Win 10, gtx970
Blender 2.8 4d795cee4938
Using Eevee, the random is flickering on these specific objects, only when moving the camera. And also the color ramp is not behaving as normal.
But now, after I open the blend file again, I see all the objects in black color.
This bug can appear only on old models, but if you create a new model in Eevee, it works fine.