autosize with long content

[FreddieBoi]

I'm experiencing some issues with autosize and long text content (or small window sizes).

Please, have a look at https://jsfiddle.net/jh63dakh (I'm using Chrome 53 on Windows 10). Sometimes when resizing the width of the window it causes the last row to disappear (i.e. height incorrectly calculated)

It seems to be triggered by the width: 100% styling and that the content is long enough to reach the bottom of the body / viewport.

I'm not entirely sure, but perhaps it's related to #306 Vertical scrollbars when browser zoom level <> 100% (or even to #251 Set height in em rather then px).