help needed NIF Skope Breaking Geometry When Converting

[UrbanDestroyer]

So I'm trying to make  a custom head by exporting the vanilla one from the Racemenu and I can't seem to import my one.

I've noticed that the branch I've edited, the mesh, is a BSTriShape and should be a BSDynamicTriShape and when I try to convert the mesh the geometry goes crazy and consumes the screen.

 

Has anyone had this issue before or know why this would happen.

 

 

Face as BSTriShape before conversion.

 

Broken face after being converted into BSDynamicTriShape.