UE4 Problem - Apex cloth

Hi,
When I create a cloth in 3Ds Max (by Apex cloth) it works good, without problems but when I import it in UE4 I have a problem with the “flag” (cloth) because it look likes bugged (like a pulled cloth).

Can someone make a Tutorial video how make a cloth? I have watched all the videos but it’s still “bugged”

https://postimg.org/image/4bc3jcznr/