If a shift did not record at all, you can add it yourself in about a minute.
Open WorkTime™, tap ADD SHIFT HOURS, choose the WorkZone™ where you worked, set the start and end times, then tap the green button to add it. Adding a missing shift does not ask you for a reason.
For the full walkthrough with current screenshots, see https://resqmedical.com/fix-your-hours/
If the shift did record but the times are wrong, tap the ••• button on the shift card and choose Edit. The same walkthrough covers that, including why an edit sometimes will not save.