Video will not play automatically in online interactive PDF

Hello. I have imported a video on the cover page of my interactive PDF (published online/epub) that is intended to start playing automatically when opened. When I open up the URL, the video will not start unless I navigate through the document and then go back to the cover page. Only then will start playing. So, I don't think the problem has to do with the video being inserted incorrectly. I'm wondering if this is a known glitch. Has anyone else coming across this issue and found a way to fix it?