I am unable to add a note tied over a barline to an existing note of the same duration.

Open a new score.
In bar one, 4/4 time enter an extemporaneous half note followed by a dotted half note.
Proper result. The note is tied over the bar line.
Now attempt to add a 2nd note, again with the duration of a dotted half.

Result:
whether adding via keyboard (Shift+note) or mouse, with or without shift, does not work

Via keyboard: half note is added, no tied note
Mouse: present note is shifted to the new location.

Regards.