Metadata field "displayFormat" is wrongly applied to facet values

[vera]

What steps does it take to reproduce the issue?

1. Have a metadata block activated which contains at least one facetable field with a non-default displayFormat, e.g.

   • authorAffiliation in the citation block is facetable and has display format (#VALUE)
   • city in the geospatial block is facetable and has display format #VALUE,

2. Have a collection with that facet turned on

3. Create a dataset with a value in that facetable field

4. View the facets on the collection page, which look odd due to superfluous commas or parentheses:

   1. city:

      (see here: https://demo.dataverse.org/dataverse/veratest)

   2. authorAffiliation:

   3. The field topicClassification includes double parentheses, not sure why, but I think it might also be related:

      

      (see here: https://demo.dataverse.org/)

Which version of Dataverse are you using?

v6.8 and v6.9

Any related open or closed issues to this bug report?

Did not find any open issues.

I think the bug was introduced by #11750 with this code change:

Are you thinking about creating a pull request for this issue?

Possibly yes

[pdurbin]

3. The field topicClassification includes double parentheses, not sure why, but I think it might also be related:

I couldn't see this on demo but I do see it at https://data.aussda.at

[cmbz]

2026-03-23: Pull request may be created to address issue (that is likely a small size). Bug has been reproduced.