Accordion shows expanding animation when navigating to page

Hello,

when my accordion group is initially opened with is-open attribute, navigating to the page shows the group expanding. I know this occurs since 0.13.4 or even earlier (I'm on 0.12.0 at the moment). I think this is is bad behaviour as something that is already opened, should not animate an opening animation when navigating to it.

[wesleycho]

Please reproduce with a Plunker.

Yes, ofcourse: http://plnkr.co/edit/BVsBM7XFWAhGDpj6xghz?p=preview

Note: The initial animation looks really ugly for long content: http://plnkr.co/edit/GdKMyTJcIWJqf8W8Hm76?p=preview That's another point why I think it should be avoided at all, when already opened.

[wesleycho]

Closing, as this appears to be a duplicate of #4849

[wesleycho]

Reopening, as this actually turns out to be separate