Polymer PaperDropdown Menu not getting reset to default after dynamically changing contents.

[mahendra...@gmail.com]

Steps To Reproduce Issue :

Step 1 - Select Item 1 from dropdown.

Step 2 - Press Change Contents Button(It will change contents of dropdown dynamically)

Step 3(Issue) - Dropdown does not gets reset to default.

Step 4 - Refresh page and select Item 2 from dropdown , press change contents.The dropdown get reset to default.

Link : 

https://jsfiddle.net/mahendra14/2n702j7y/