UserAgent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0

Example URL:
http://codepen.io/emyarod/pen/PzZoBz

Steps to reproduce the problem:
1. Go to http://codepen.io/emyarod/pen/PzZoBz
2. Click the "Compile" button

What is the expected behavior?
The spinner is expected to rotate infinitely.

What went wrong?
jQuery should add the class "compiling" to the button, make the button text color transparent, and a loading spinner should appear on the button. However, the spinner will be completely static.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No 

Did this work before? Yes within an hour of the CodePen's creation

Does this work in other browsers? Yes 

Chrome version: 53.0.2762.0 (Official Build) canary (64-bit)  Channel: canary
OS Version: 10.0
Flash Version: 22.0.0.177