Renaming WP map does not remove original external actors

Renaming a WP map through the content browser does not delete the external actors associated with the originally named map. The rename duplicate builder seems to work correctly and can be used instead: https://docs.unrealengine.com/en-US/world-partition-in-unreal-engine/#worldpartitionrenameduplicatebuilder.

• Create a WP map.
• Notice external actors in the  "_externalactors_" folder associated with it.
• Using the content browser,  right-click the map and rename it.
• Notice there are still external actors in the  "_externalactors_" folder associated with the originally named map.