Ionic -3: Pull to refresh take down header

Here is the component orders of my view

  1. Toolbar
  2. Segmented button as tabs
  3. list

In between of 2 and 3 ,i have ion-refresh, specially on iOS when i perform pull to refresh and before its gets complete,i again try for second attempt then it take down segmented button header.

its appear to me bouncing or overflow-scroll issue but it could be rubber elastic scrolling .

Does any one has faced this issue with ionic :3.6.1 ,Please provide solutions