When doing mesh(SK and SM) re-import, package UMetaData is lost

To add some meta data to an asset you need to do a "Editor Utility Widget"

I create a button that add the metadata to a specific assets here is the onClick graph of my button

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I use the content browser asset context menu "Asset Actions"."Show Meta Data" to see the meta data for an asset

Import a static and a skeletal mesh

Add some UMetaData to each one

reimport the staticmesh

reimport the skeletalmesh

RESULT: The UMetaData is lost for both assets

EXPECTED: The UMetaData is restored properly for both assets