UNIMARC Elasticsearch indexing should be updated, taking into account the new IFLA manual (bug https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=39992) and some of the old proposals (mostly obsolete) made in bug https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=20424 I will take care of that
Check the $9 with koha-auth-number
Can you be more explicit please? If there is an issue with this field maybe we should fill a specific bug... This one was thougth for taking into account new fields defined in UNIMARC format, not to fix a Koha-specific problem.
Ah yes indeed, this is a bug on current ES config. I'll create a new bug