Please could someone try to add that relationship in place of me?
At least I’ll know if it is an issue only of mine or of that page: I can’t add, edit, or remove external site relationships literally only for that artist, with or without adding edit notes, and with or without making the edits votable!
The bug happens only for the “External Links” section, while the “Artist Details”, “Date Period” and “Relationships” sections seem to work smoothly.
Seems we are trying to store way too much data in sessionStorage, which the browser doesn’t like. It throws an exception, which prevents us from adding any hidden inputs to the form (which is why it doesn’t see any changes). This should only happen on artists with a lot of links. Working on a fix…