In the attached, the right hand leader was made by copying the left hand leader (with history recording on, via Gumball Alt+drag). The text of the right hand leader was then modified via the Properties box.
Now, move the left hand leader. The right hand leader text reverts to the original unmodified text…
(I assume that modifying a leader’s text should break the history…)
Leaderbug.3dm (321.2 KB)