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Selected underbar does not appear when revealed from core-collapse #45

Closed rhashimoto closed 9 years ago

rhashimoto commented 9 years ago

If I put a paper-tabs element inside an initially closed core-collapse element, it does not indicate the initially selected tab (with a colored underbar) when revealed. The underbar is correctly shown when the selected tab is subsequently changed.

Here's a jsbin showing identical paper-tabs contents, one at top level and one inside core-collapse. When the button is clicked to open the core-collapse, the selected underbar is missing from the first tab on desktop Chrome 39:

http://jsbin.com/moqigi/1/edit

rhashimoto commented 9 years ago

This appears to be a duplicate of Polymer/paper-tabs#37 (Invisible selection bar).