command Double click for new linked note not working

scapple 1.4
Mac OS 11.2

With a note selected Command Double click to create a new linked note only creates a new unlinked note.

However Option Double click creates new linked note with arrow.

Also Double clicking on dotted line doesn’t create a new linked note between but creates an unlinked new note. However double clicking on an arrow link creates a new linked note linked with arrows.

This is not consistent with the expected behaviour in the manual.

Any suggestions.