List empty after visiting page twice


Hi guys

Ionic Creator v1

I have a listview and populate it dynamically -:list = doctortype
On ng-click I open next page and dynamically populate list = doctorsperdiscipline using doctortypeid (select value from 1st list)

The first time on click an item in first list the second page open with list populates 100% .

When I navigate back to first page and select any doctortype again the list on the second page is empty.
I know the data is on the second page populate as the console log shows me the object selected the second time.

Any advice will be appreciated