Tried other clients, same thing. Below is th einfo you requested.
--- The query
SELECT timesheet.rowid,
TO_CHAR(timesheet.start_on_duty_date, 'DD/MM/YYYY HH24"h') start_on_duty_date_str,
TO_CHAR(timesheet.end_on_duty_date, 'DD/MM/YYYY HH24"h') end_on_duty_date_str...