Greetings Artherian,

I'm sorry to hear that you're experiencing this issue. It does appear you've tried troubleshooting on your end already as well. I would just like to confirm if this issue is only occurring on one character or multiple characters but at the same location?
If you haven't already, I would like to suggest to either rename and move the local Final Fantasy XIV file folder OR delete the local Final Fantasy XIV file folder which is located in My Documents > My Games > Final Fantasy XIV - A Realm Reborn. This folder contains local files that can sometimes get corrupted and may cause similar issues to the one you're describing. (If you choose to delete this folder, please note that this does contain UI settings, macros as well as screenshots)

I hope this helps and thank you for posting in the FINAL FANTASY XIV Technical Support Forums.