Default Activity - Method Call not being called when bounded taskflow opens for the 2nd time when backed on Browser back button ADF 12c - EBS integration

We can overcome by using dynamic regions which accepts Parameter* instead of region in the jspx page. Make sure you pass unique/different parameter to the dynamic region taskflow in order to get the method call(default activity) invoked on the taskflow re-entry

This issue occurred while navigating from EBS to an external ADF application using JDeveloper 12.1.3  

Reference; https://community.oracle.com/thread/3548970