Images in landscape on mobile are all full resolution (srcset)

I’m currently using the Avada theme and, for whatever reason, all featured and related post images are full resolution on mobile devices when in landscape. On desktop and in portrait orientation, images are their resized / optimized versions. This problem is fairly large as most full size images are over 7MB in size, and when there are at least four that end up on a page, that can unnecessarily eat too many resources.

Here are the two PHP files that I believe are associated with how the theme handles srcset.

https://pastebin.com/pnN9PLnR
https://pastebin.com/NgCcyVac

I can send a link to the development environment via PM if people are interested.