HI
after I did an updated the X theme and update latest wp. And I have one page that the top container just keep disappearing on at a certain widths (see screenshot) and then shows at smaller and larger page sizes, I had had some issues with cornerstone not saving the page at all after the update but i reinstalled a fresh plugin and all was ok.
the page with the issue
http://autodeskfusionconnect.com/iot-discovery-toolkit/
similar set up page no issue.
http://autodeskfusionconnect.com/toolkit/
thanks
e
