I am facing an issue that the date and time based calculation is not automatically updating / re calculating while opening the save and continue link and its submitting wrong calculation data.
The calculation get auto updated only if the user jump one page to another once they open the form though the save and continue link.
Gravity Forms doesn’t support time or date fields for calculations out of the box. I would recommend you to contact the author of the add-on or custom code that you’re using to add that functionality.