Lines all over static mesh when importing fbx from Blender

Hello,

Does anyone have experience with problems like this, or tips for how to import fbx files from blender to avoid this happening?

This happens with almost all of my fbx imports (I am importing them into blender as stl and then importing them as fbx into unreal. Occasionally, one of my figures will come out okay, but I don’t have any idea why.

Any help would be much appreciated.

how does it look in blender? can you share a fbx for testing?