Forms not saving changes

I’m currently trying to link our mailing list service as “additional storage” for a newsletter sign up form, and despite connecting it about 4 or 5 times now, the “save” option doesn’t appear until I edit a text block (I literally just add a space and then delete it to make the “save” appear), and when I save and then exit, the form doesn’t stay saved. 

I get NO error messages from any end. Apparently, the mailing list seems to connect just fine every single time. None of the form field edits are saving (I tried changing the button text from “Submit” to “Sign Up!”), and each time I check after saving and exiting, the mailing list isn’t connected to the form.

I’ve tried to change the fields on another one of the forms on my organization’s page, but gave up after new fields wouldn’t stay saved. I would like to figure out what the problem with that form is, but it’s not as big of an issue as the newsletter form at the moment.

I forgot to add for context: I primarily work on ipadOS, so I tested connecting the form to our mailing list service on a Windows PC and the same thing happened. No error messages, just the same “save” option not appearing until I edit a text block, and then the form’s changes not saving.