Supposedly ABRIDGE should work as a link in the Text Notes field at https://hymnary.org/hymn/SOHB2019/119a. But it doesn't seem to.
I'm pretty sure the text links only work in the text authorities. Just add a note without a link, such as "Suggested tune: ABRIDGE, also known as ANN'S"
Okay, but fwiw ANN'S is a second tune suggestion, what we now normally call ST. ANNE. It would be helpful if the untrue statement about such links could be hidden if not deleted when one is doing a text instance authority. https://hymnary.org/files/hymnary/image/UNTRUE%20about%20links.jpg
Oh, I see. We have fixed the problem so the links are now supported in instances.
Thanks for figuring out what the problem was and fixing it!