I've been using Coracle so I hadn't noticed.  I didn't change anything with following lists recently that I can recall.

Perhaps Amethyst changed to NIP-44 encryption for the content and forget to support decrypting from both?  Just a wild guess. Vitor should know more. 

 Humm.. I don't we I have migrated yet, but I did add the parser for nip04 and NIP-44. There might be a bug somewhere. I will check.