UserAgent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.82 Safari/537.36

Steps to reproduce the problem:
1. from parent open child window1 with window.open
2. from child window1 open child window2
3. on child window2, click on done, open child window1 and close child window2
4. check self.opener in child window1 which is null.

What is the expected behavior?
child window1 should still have parents reference

What went wrong?
not sure..child window1 considering child window2 as its parent

Did this work before? N/A 

Chrome version: 52.0.2743.82  Channel: n/a
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: Shockwave Flash 22.0 r0