Some content disappears in phone breakpoint when published

Hi, I’m having a problem with my website in the smaller phone breakpoints, and weirdly only on some of the pages. Some of the content won’t show or looks different when published (shows perfectly in preview mode). But when I flip my phone into horizontal it all shows again.
Any ideas as to why?

I experienced similar issues when publishing the home page of my site recently. Certain images would just not display, even though they were shown in design view. I hit publish and refresh several times to try and figure out if I had a cached version of the page. That was not the issue.

Today the images disappeared from design view and I had to add them back in.