So starting with credentials 1.28 and https://github.com/jenkinsci/credentials-plugin/commit/68dc8c9607ec66f474824ec0489a38c205bfdd18, the list of credentials returned by CredentialsProvider.lookupCredentials is now sorted alphabetically. That means that if you've got multiple providers supplying different credentials for the same ID, CredentialsProvider.findCredentialsById will return the first of those in alphabetical order. The result of this is that you don't necessarily get, say, the folder credential instead of the global credential, if the names are different. This...seems wrong to me.