Carousel slide animation bounces slightly on completion [iOS9/Safari]

Created by: henwen

This is new behavior on Alpha 6 –

On completion of the slide animation, the carousel-item content has a small horizontal bounce on the left edge of the carousel. It's a bit hard to see in the gif below, so visit the docs on an iOS device if you have one for a clearer example.

This behavior is only on iOS9 Safari (as far I know) and is likely related to whatever's causing issues #21749 (closed) and #21750 (closed).