may i ask you to help me understanding why the transition animation for the sliding in an amp-carousel 0.2 is not working on Safari?

How do we reproduce the issue?

Example in playground

open the link in Safari change "https://cdn.ampproject.org/v0/amp-carousel-0.1.js" to "https://cdn.ampproject.org/v0/amp-carousel-0.2.js" click the transition button of the example What browsers are affected?

Seen in Safari on Mac OS