Forum Discussion
SharePoint Library - Invisibile Metadata
We fixed it by restoring permission inheritance on ..Lists/TaxonomyHiddenList, so it now inherits permissions from the parent site.
According to Microsoft documentation, this list is supposed to automatically inherit permissions from the site. I don't know how it ended up with unique permissions configured and with no permissions assigned. The logs in Purview also don't give any hint.
We had a similar issue where all users from one of our external guest domains were unable to see managed metadata column values. All internal users and other external guests could see them fine.
Our solution was the opposite to the solution above, we broke the permission inheritance of the Taxonomy Hidden List and added the affected users directly to have Restricted View of the hidden list.
I now will create a dynamic security group for the specific guest domain to add into the affected site.