We were made aware of an issue with our Google Sheets integration that we have now fixed.
On December 11, our underlying OAuth library got updated and introduced a change that broke our integration. The updated library did not mention any breaking changes and we're currently in contact with the developers of the library to check if we missed something.
As a consequence, older responses may not have synced to existing sheets and new connections could not be added. After we deployed the fix, earlier submissions should have been added to existing sheets as they were still in a "pending" state.
To make sure sheets are up-to-date, we suggest to manually clear the sheet (= delete all data in the sheet) and use our bulk sync function to import all submissions. Alternatively, you may delete the connection in the form and add a new one and then bulk sync the submissions.
But if your responses count is already the same as the rows in your sheet (minus the heading), there is nothing for you to manually sync.
We now have added dedicated error logs to the Google Sheets integration so in case something like that happens again, we'll be notified right away.
We're sorry for the inconvenience.