I recently updated my jquery on the backend, so I'm not sure if that has anything to do with the following problem.
Whenever I try to add a new field, there's no hover effect (usually in backend it goes blue when I hover with options to edit, delete, duplicate, etc.). So I can't edit a new field, but all the previous fields are allowing me to do so, which is the confusing part. Is there a field limit on a form or something? It just seems like a bug, rather than a restriction however.