paper-tab link not working when anchor inside a custom-element

[avizcaino]

Description

I have the following structure in my paper-tabs:

<paper-tabs>
   <paper-tab link>
      <custom-element>
         <a href="#/link" tabindex="-1">
      </custom-element>
   </paper-tab>
<paper-tabs>

But the link is only in the anchor, and does not fill all the tab. This works if the anchor is directly a child of paper-tab. Is there any solution to this?

Expected outcome

Link fills all paper-tab.

Actual outcome

Link is only in anchor element.

Live Demo

Steps to reproduce

1. Put a custom-element with an anchor inside a paper-tab.
2. Click the paper-tab element.
3. Click the anchor element.

Browsers Affected

• [X] Chrome
• [X] Firefox
• [X] Safari 9
• [X] Safari 8
• [X] Safari 7
• [X] Edge
• [X] IE 11
• [X] IE 10