Track PO Item details are not refreshed

Hello All

Facing refresh problem in Track PO standard fiori application :

first time for first PO item click details are displaying properly and for second item clicking first time displaying properly.

But when clicking on first PO item or second PO item again second time calls are not making to backend system .

_handleItemPress and _handleSelect methods are defined in standard sap.ca.scfld.md.controller.ScfldMasterController .

Anyone is facing these type of problem for Track PO.

Any idea from any one ? Please through your inputs here.

Thanks

Srinu