The ionic2-starter-tutorial has a ion-scroll in the sidemenu that does not scroll on Safari or Android. It works properly in Chrome.
A solution is to add a position:relative style to the ion-content, but then go into dev tools when you load the page, and manually uncheck, then recheck that style.
See https://github.com/JacksonKearl/ionic-2-testing for a minimum working example. All I have done is add many more pages to the scroller.