Mesh clipping after import

After importing a model into Unreal (Skeletal mesh consisting of a Body and Armour-Mesh) i noticed some clipping. The Body Mesh is clipping through the Armour-Mesh.
I attached some pics. The first shows both meshes in Blender, the second directly after importing.
Both are in the default-position.
I can’t figure out why the clipping occours. Could it be an problem with the import setting?
Does anyone have an idea?

Nevermind. The model had some shape-keys, that caused trouble. My bad.