Remember the scroll position doesn't always work.

[pieter-v]

If the width/height is not known in advance (e.g.: width is 80% of the parent element) and if the layout needs to know these values to determine the sizes of the items (e.g: a layout where each item is a square and has ’n’ columns), then specifying a scroll position doesn't work.
This is due to the fact that ember-native-scrollable is inserted into the dom before its parent ember-collection. So, the first time when the layout.contentSize is called, the clientWidth and clientHeight is not known. Therefor applying the saved scroll position has no effect