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Duplicated meshes when doing Datasmith reimport

Hello,

UE version: 4.20.3
Datasmith exporter version: 4.20e
Exporter software: 3ds Max 2017

We encounter an issue when we do a full reimport of a Datasmith scene.
One mesh was slightly changed since the last import, nothing was deleted, added or anything. But somehow when we run the reimport all the meshes are duplicated inside of the map…

Screenshot of the Geometries folder after the reimport is down below.
It’s not updating the existing meshes but instead creating copies of the ones already existing and adding those to the map.

We ran out of idea’s why this is happening. Other Datasmith scene’s inside of the same map are updating fine. Just this one isn’t.