ProjeQtOr Timesheet Data Loss - Assistance Required

Hi,
We manually manage ProjeQtOr timesheets, reviewing resources' work twice weekly (Tuesday and Friday). A resource reported missing timesheet entries, which I verified in our backup. Despite regular reviews, these entries vanished from the system. I couldn't locate them in the activity stream, history, or "work" table. Could you please help me determine why these entries disappeared.
 

Hello,

I checked but found no clues. There is no log of changes to the timesheet; it only updates in the assignment.

Hi There,

I don't understand! Something strange is happening. When the report: (parameters year : 2024
week : 38 Detailed work per resource - weekly) was sent automatically on the scheduled time, it showed 33 hours for one of the resources, but when I checked just 15 minutes later, it displayed only 26 hours! Due to the unavailability of logs, I am completely helpless in determining the reason for this discrepancy. Could you please help me find the cause of this issue? If there is no existing feature to log timesheet changes, I kindly request that you include this functionality in ProjeQtOr.