With a NavigationPage moving from one page to the next

I have a NavigationPage and we move from page to page, one after the other. We do this by PopAsync the current page off the top and then PushAsync the next page on. This works perfectly on Android, but on iOS it will redraw the root page when moving between pages. This looks like a quick screen flash.

Is there anyway I can stop the root page from redrawing like this?

Thanks.