Slider not loading

Hi guys,
I was having a problem with my ShopIsle theme that sometimes it would get stuck on the loader screen and you would have to refresh it a couple of times before it would work.

So I decided to update my version ( I was using the uploaded version from the ShopIsle website and changed to the WordPress version). I installed the companion plugin for the website. This completely got rid of the loader so there’s a flash of unstyled content.
In addition to this the slider now only works sometimes.

Does anyone know what may be my problem?

My website: coffeehanger.com

The page I need help with: [log in to see the link]