Submissions' date and time won't appear on the Spreadsheet

I have noticed that for the last couple of weeks, the submission date and time do not show up on my spreadsheet.  I have to go in and copy them from JotForm and paste them into my spreadsheet.  Is there something that needs done to refresh them?

According to my tests, it is showing the date and the time of the submission on the newly created Google Spreadsheet integration. Please, see it from the below:

I can't see your spreadsheet; but I assume that refreshing the integration will solve the problem and also, you don't need to worry about the previous submissions, all of them will be moved to your new spreadsheet.

Please, try this one and let us know the results.

Regards.