Edge animations don't work, some of the times...

Hi, I'm using multiple edge animations on my website.

sometimes the animations are loaded and sometimes they don't.

I can't figure it out why...

My website's URL: https://www.myaguda.org

(t's Joomla! CMS based)

if it's offline use:

username: edge

password: edge

the website is in Hebrew, but that doesn't matter for the test.

all the blue squares are edge animation.

if you log-in and everything works, refresh and check again.

once every couple of times, it just wont.

thanks a head for your help.