Issue with exporting custom mesh from Maya into UE4 (Material gets distorted)

Hi guys,

I’ve trying to wrap my head around importing custom meshes from Maya into Unreal. I started simple, just manipulated a plane. I made sure it has enough tesselation (wanting to use some Displacement).

This is how it looks within Maya (as far as I can tell, everythings seems fine?):

This is how it looks within Unreal though (the strechted part in the first picture below is also where my Material gets stretched):

Can you guys give a hint as to why this is happening?

Thank you!