You're right about the full size being the reason, unfortunately FA doesn't have a native way to fix this other than just reuploading. Once you've fixed it, people will see the full sized version without needing to refresh

I've seen others use a browser extension called FABUI that allows you to bypass the size limit, but I've not tried it so I'm not sure how it is or if FA has a problem with it being used

Thank you so much for responding! I truly appreciate it. That’s really interesting, I’ll have to check out Fabui. One of my friends uploads bigger canvases (bigger than what I use) and they seem to upload the actual size/res first try? Have you heard of anyone else not having this type of issue with the extension?

No idea how your friend is doing it without reuploading, I'd also like to know how! I haven't seen anyone having issues with FABUI yet, but haven't seen that many people using it either