I had some tasks that were overdue. These were tasks created prior to version 5.
I changed the date to a future date, say 12/11/19, and select the No Time option. Then click done. The due date is set for 12/10/19. I tap on due date to bring up the selection screen. The date and time is shown as 12/10 at 11pm.
I have tried various ways of updating the task, but it seems that it is requiring a time. It used to be, I think, that selecting no time set a time of 12am. it worked prior to version 5.
Most, if not all of my tasks are not time based. I just need a start and due date.