3D FlipBook - URLParam doesnt work

We are using the URLParam for one of our projects to direct the user to the specified product in a PDF.

Sometimes when opening the Flipbook it doesn't automatically go to the specified page. I noticed that when you open 3 links simultaneously and tab to the next ones it always goes to the second page.

Screenshots http://prntscr.com/rv7err http://prntscr.com/rv7gcw http://prntscr.com/rv7h5j

Shrotcode used: [3d-flip-book mode="fullscreen" urlparam="pid" id="739" title="false" classes="fb3d-h-1000"]

Please help