3D FlipBook - Plugin Not loading for 3-4 seconds after opening the page

Reposting this as my last questions vanished. We have resized all our PDFs to the bare minimum possible, however, there is a 3-4 seconds delay from when we click on the link and open the page to when something appears on the actual page. We are basically seeing a BLANK page before the app loading appears.

This is far from optimal user experience as I can expect at least 30% of users closing the page because they will think that the page is empty. Is there any way to fix this?