User cannot add custom 3D model from Navigator/3D view to User Assets

If user adds custom asset to 3D view, they can try to add it to User Assets, it doesn't show there.

qtdesignstudio_AJXEImEmNa.mp4

See the video for demonstration.

QDS seems to acknowledge that the asset is in the User Assets, but it doesn't show there. Could the cause be, that the name of the .FBX has a ","?

You can use this asset for testing:

Box,.FBX