Just Re-Enter It
Check Your History
Make sure that the event truly did not stick. Sync your app, then go into the History tab of the relevant order and check to see if your submission is there or not.
Re-Enter the Information
If your submission is missing from that order's history, simply enter the information again. That's it! Depending on the circumstances, you may be asked to respond to transgressions - like your GPS coordinates being incorrect. Writing something like "Submission was not saved" is sufficient explanation for these instances.
Won't this affect my Reporting Requirements?
Yes, but only very slightly. When prompted, simply explain that the entry did not go through, and that you had to enter it again. Make sure to include a picture - perhaps of your coversheet with your service notes on it.