Blender 2.8 render contains bad stripes? Trying to render an image, only to find the result contains bad stripes, both in Eevee and in Cycles. What is going on here? The viewport render looks okay, though... 

Blend file: enter link description here
The problem is in Cloth and Subsurf being in the wrong order in the modifier stack: Cloth must come before the Subsurf. For some obscene reason, this doesn't show in the viewport, not even in the render preview in the viewport, but it does give  horrible results in the final render.