Player javascript only working after page reload

Hi, my customer has the current player version running (2.7.2) in a current WordPress installation with the Bridge theme. My problem: the player buttons only work after reloading the page. If I come from the home page and go from there to the media page, only the play buttons are there, but without function. All tested browsers (Safari, Chrome, Firefox, all Mac) show nothing in their respective error consoles. I′ve found out that the .js file won’t load when I just load the home page (no players placed there…). Only after reloading the media page. Once loaded of course, all is fine… Any suggestions? Thanks!