Tabs: Browser back doesn't take us back to default tab

[jamiechong]

How to reproduce this bug:

1. Setup some tabs
2. Set these options: data-deep-link="true" and data-update-history="true". The 2nd option pushes state onto the browser history.
3. Click a few random tabs
4. Click the browser back button and watch the URL bar
5. Repeat step 4 multiple times

The hash changes as you click the tabs. When clicking back the state reverses and the previous tab loads accordingly. However, when getting back to the original URL, the tab state doesn't update.

• Landing page -> example.com/ -> active Tab 1
• Click Tab 2 -> example.com/#tab-2 -> active Tab 2
• Click browser back -> example.com/ -> active Tab 2 (BUG)

Browser(s) and Device(s) tested on:

Desktop Chrome

Foundation Version(s) you are using:

6.4.3

Test case link:

https://codepen.io/anon/pen/LdeRmW