Hello,
Are you talking about slider at the top of the page? I don’t see problem with this https://gyazo.com/c1794b1deb0709a12418a0369ec6a075
But image is not optimized and if you have not a very good connection image probably just was not loaded. Optimize your banner image http://prntscr.com/v5a023 and other images using https://tinypng.com/
Regards