Issue with MMPURPAMEPO transaction after upgrade EHP7

Hi All,

we are using MMPURPAMEPO transaction in our custom webdynpro application and skipping the first screen by proving values and tab value.

Before upgrade in ehp5 system, it was working fine as it was skipping first selection screen.

But after upgrade in ehp7 system, it is showing us first selection screen with values. It is not skipping initial screen.

What could have changed after upgrade.

   'http://' host ':' port '/sap/bc/gui/sap/its/webgui/?sap-client=&~transaction=MMPURPAMEPO&%20P_EBELN=' ls_output-ebeln '&%20P_EBELP=' ls_output-ebelp '&%20P_TAB=13'
                      '&~OKCODE=MEOK'

Same code before and after upgrade.