Is there a way to find out why Document complete is not fired on this page:
https://www.webpagetest.org/result/170125_P9_FBX8/1/details/#waterfall_view_step1
I can see the screen shot - so the page loaded successfully.
Maybe there is some kind of a time out at WPT that fired before the document was completed? The page is rather heavy with 600+ requests. So that could be a reason.