Can't reimport weight maps in World Composition

reimporting via world composition does nothing for me in 4.16.2
reimporting via landscape editor one by one takes forever and i get a unshaded lod0 if i load more then 2 layers and a crash when i load more then 3 layers.

this is a 8x8 1009 tileset with 6 weightmaps from worldmachine that get updated and never change loaction…they are simply overwritten and i need to reimport them. their location is outside of the project root, on the local machine