Half Day - Leave Application not connected with Attendance

[dvkrvs]

Dear Guys,
I am setting threshold for half day is 6.5 hrs through Bio-metric Auto Attendance . Its works fine in attendance. The employee applied the leave successfully for half day. After the leave approval process, usually the attendance record should be updated on that day.
The leave application made by employee though his login, the attendance record was not updated even leave approved by the Approver.
If the leave application made by either HR user or HR Manager, the attendance record updated successfully.
Pls help me to solve this issue. Thank you