Slow Slider Images

Hi! I'm still setting up my website (https://www.fathomcyber.com). I really love the WEN Business theme! However, the page load times are incredibly long for the landing page. Looking at the results from Pingdom and other sites, it looks like the slider is pulling content from another website (i1.wp.com) rather than my own. I don't understand why it is doing this. It should be pulling from the featured image from my site instead. Any ideas why this is happening? I've tried deleting the pictures locally (on the server) and adding them again, then re-linking the new pictures as the Featured Image, purging the local cache, and purging my CloudFlare cache (in that order). But that still didn't seem to help.