Disable "bounce" effect on iOS version


I’m having an issue with my application on iOS.

Basically my header is a gradient background (not the ion-content) and on iOS when I scroll up the page become white (as it’s the background color of the ion-content).

My question is: is there a way to make my gradient background going upper when I scroll up on iOS or is there a way to disable this bounce effect without blocking the scrolling ?

I know I can put this background to ion-content but that’s not the idea as the gradient background will go at the bottom of the app which is not what I want :confused:

Here is a picture to illustrate what I’m talking about:

Thanks for your help!