The photos clicked at  End Job/Travel is not saved in Salesforce. When you click photo/image before Ending Job/Travel and click the Stop Job/Travel you see an error message on the mobile screen as below

                "Missing Timesheet No timesheet to tie the image to OK"

This is a known issue, the images clicked at the time of Check-Out is not saved in Salesforce, but you are Checked Out of Job/Travel.

This will be fixed in our next release of Mobile Time Tracker.

The images not getting saved issue is fixed in the Mobile Time Tracker version 1.72 in Salesforce.