Chrome Version       : 50.0.2661.102
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
URLs (if applicable) : https://jsfiddle.net/t9tkryc1/
Other browsers tested:
  Add OK or FAIL after other browsers where you have tested this issue:
     Safari 5: 
  Firefox 4.x: OK
     IE 7/8/9:

What steps will reproduce the problem?
1. https://jsfiddle.net/t9tkryc1/
2. Observe the animation
3.

What is the expected result?
Both rects should be animate

What happens instead of that?
Only master rect animates

Please provide any additional information below. Attach a screenshot if
possible.

UserAgentString: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36