To reproduce:
Set the interval to 2h.
Create an mlo widget (widget which displays tasks) on android screen.
Run mlo from the standard mlo shortcut.
Enter password.
Press home to switch to the android Homescreen.
Run mlo from the WIDGET!!
The password screen will be displayed again. (Instead if you run mlo from its default shortcut, the password screen won't be displayed).
So it seems to be a bug.
BR
Andrei