Cloth simulation artifact

hello guys , I trying to use ue4 cloth simulation , but when I play , cloth mesh Artifacts appear.

image1 :no play
iamge2 : play and artifact appear
image3 : cloth setting

I have try to toggle recompute tangents but it seem not working.
dose any one know how to solve this?

  1. Mesh with simulated bind pose, that’s mean that you can’t get physically correct simulation.
  2. You had broken Drags. And Tether config weird.
  3. Solver frequency for this poly count should be more than 500.