Created attachment 256170 [details] Animated Gif of the problem Thanks to @Nikita for the Gif of the problem.
<rdar://problem/21675872>
Created attachment 256171 [details] Patch
Comment on attachment 256171 [details] Patch Clearing flags on attachment: 256171 Committed r186289: <http://trac.webkit.org/changeset/186289>
All reviewed patches have been landed. Closing bug.