Can anybody tell me how to avoid these nasty artifacts that make the flag look like it is broken on the folding part. They are shown in the Viewport and final rendering. Here is a still from the 15 second animation. I should mention that I created this flag with the "Import>Images as Plane" add-on.
It is a simple mesh, just a plane with subdivisions. The problem began when I started messing with the Force Fields and Physics.