Mapper Window Not Opening in previous Docked Factory Location

[monil2233]

To test
Close Mapper via X → menu unchecks
Window → Mapper to reopen → should land back where it was just before close (in this case the original mapper-dock position at center-bottom)
Optional drag test: drag Mapper to a new spot (e.g., where Backpack is), close it, reopen — should come back to the dragged spot, not the original.