Let's confuse the issue deeper...
Site just went white in my browser. too long to read error in the error.log for nginx.
I open up Chrome, it works.
I open up my iPad, it works (also a Safari based item).
So something in Safari/desktop is not playing nice with the site.
BUTTT (there's always one)
The site does not show stats, admin info, etc. in ANY of these broswers or devices unless I load the site up with the port # info :4567 -- also the same re: Login showing after signing in and getting Admin access.. all that happens over everything.
So I'm thinking it's a nginx setup issue because it's obviously not node/forever/etc.. they're all ok.. it's something with the proxy/nginx config.