Cursor always jumps at end

[abourget]

This code creates a really annoying behavior:

<input is="iron-input" value="{{mama}}">

When you click in the middle of the string you typed, the next character you type jumps at the end of the input field.

[abourget]

This even occurs in the plain demo/index.html, on Chrome Version 42.0.2311.90 (64-bit) Linux, but doesn't show the problem in Firefox 38.0.. looks like a nasty one..

[morethanreal]

Appears to be fixed.