iPad gets struck frequently while performing sync of WM 5.3 Application

Hi Experts,

The iPad gets struck frequently while performing sync of Work Manager 5.3 Application from the device.This happens to be a frequent issue where the device gets struck hours together.We have fixed temporarily by deleting the Agentry Application.We have even tried to uninstall and re-install the Agentry Client.There are no error found in Server logs and also in slg1. Please suggest if there would be any settings in ECC for particular user to get the sync fast.The work orders downloaded to the device are only few.There seems to be no network issues. 

The Agentry Client version is v6.0.50.1 and the device OS version 8.1.3.Kindly suggest the reason for iPad struck while performing sync.

Thanks in advance.

Thanks & Regards,

Sravanthi Polu