To illustrate, make a parent task called "test". Then a
sub task called "test1". Now go to ToDo and change the
date (or any other property). Return to progect, and
the name of the subtask in progect is now "test1 |
test". (This is in the flat view).
I just realized that it works ok in the regular "tree" view.
But in Tree view the name in the "ToDo" is
simply "test1", not "test1 | test", which I think it should
be in ToDo.
So, it seems there are actually 2 issues, or that flat
view and tree view behave differently. In Tree View,
Linking with ToDo creates an item with the name of the
subtask, but doesn't include the "| <parent task>"
suffix. But in Flat View, the "| <Parent Task>" suffix is
added, however, if you change anything (such as
priority, date, or notes), in the ToDo app, and go back
to progect, the name becomes "test1 | test" again, in
progect.