Hi Dan,
I did test with v7.0.7,
on both start then due dates (not mixed),
and for each case,
with and without the preference for automatic refresh
(i.e. option box checked and unchecked - just in case it might be linked one way or another).
For all the cases tested, I have to conclude that it is
not fixed so far.
When TDL app is not the foreground app, the popup is displayed (after a delay of about 20 seconds) and catching the foreground role.
I feel sorry for this bad news, and thank you for the try you did.