Course Page/ Website Freezes

Hi everyone! I’m fairly new to the site after many of Mosh’s Videos and decided for Christmas to buy one of his plans for courses, after about a wekk or two of working with the courses I find that a good amount of times the website for me Freezes and I am unable to pause/start the video, click to the main page, and for that basically do anything. I can get the website up and working again after refreshing but after 5 or so minutes it goes back to where it was frozen. Anyone have any ideas what this could be?

Thank you!