Why are my images not loading?

Hi all,
I am currently using this theme REHub - Price Comparison, Multi Vendor Marketplace for Wordpress, Affiliate Marketing, Review Theme by sizam on one of my sites.
And if you scroll it a bit down, you can see this fragment with carousel (screenshot is attached)

This screenshot was made after 30 seconds of being on this page.
I dont know why it takes so long for these images to load, when Im viewing it through Safari browser.
It happens all the time and the main thing is that when I use Chrome - everything is ok.

Does this happen because of the browser or images size?
Thinking to switch this theme because of this carousel.


Contact with your purchase item author hope they will helped!