Angular-ui-bootstrap-tabs animated transition in but not out

I updated an example by user @austin

I'm have an issue when transitioning backwards (ie. tab3 to tab2. forward seems to work fine. Wondered if anyone could see what I was missing.

<uib-tabset></uib-tabset>

http://plnkr.co/edit/UCwylcvBwGh3QmIlSkMQ?p=preview

change your ubi-tabset to <uib-tabset active="currentTab">