Hi branislav. I don't wanna say something wrong, but it seems to me that if you change page (/indesign document) while navigating, you sort of "reset" the elements on the page.
If you only slide down your document, then the states stay where they were.
For sure it's true for video, well it seems to be true for scrollable content (i checked with the frida kahlo page on Johannes "DoneMag.cc").
I guess it has to do with memory management when you leave the pages.
And i suppose this has to go to feature modification requests.