Link in Notebook element not removable

When using the workspace drawing area and creating a feature from a drawing element the link is visualized in the lower left corner of the drawing element. At the same time a feature is being created in the features area.
When I delete the feature in the feature area, the link remains in the notebook area.

When clicking on that link in the drawing, Aha says the link is not reachable.
It would be good if the link could be removed without the need to remove the drawing object.