Invesco Provided feedback
Responsive Due Date "Time" seems to be driven by what time zone the creator is in which would explain why it was never an issue until we became a global team. The time zone resets to midnight in multiple scenarios.
The day the project is created, Responsive support automatically goes in and changes it to midnight of some time zone (it is unclear to the client which one this is). This often results in the due date changing to a different day.