how to fix weights in unreal engine

My character is rigged to the epic skeleton and functions just fine in the drag and drop animations besides the fact that it slightly distorts the stomach. The weight painting in blender looks fine to me but when using the drag and drop animations it pulls in the stomach on certain animations like walking and running. I was wondering if there was any way I could fix this in unreal engine or if there is a way to fix this in blender, or a program that weights transfer to unreal better? Right now I am rigging skinning, and exporting with autorig pro

can upload more pictures if needed I’m only allowed 1 for now
Thanks so much for the help