Java script issue in tablets MS CRM 2015

Hi,

I am facing one issue in tablets.

There is a java script function written for enabling/disabling "owner" field on change of branch (lookup custom field) at the time of creating the lead and updating the lead. It is working fine in Web browser CRM but in tablet App at the time of updation it is not enabling/disabling the "owner" field. At the time of creation it is working fine in tablet also.

Can anyone help me in this. What could be the cause for this.

Thanks & Regards,

Neelam