I tried your file. Opened it on iPad Air. It fails just like mine. Scroll to the top -- a message appears at the top and the document scrolls itself to the middle of the document. Repeat scroll to the top, message appears, snaps back to the middle.
... See the message in the screen print here
http://d.pr/i/ALwt
This would make it seem like the document is not fully loaded -- but it is