Variable metadata for restricted files visible in search results

If a restricted Excel file, with variable information is uploaded, these variables are saved in the file metadata.
When you search for this variable, it pops up in the search result.

What steps does it take to reproduce the issue?
Upload and restrict a file that has variable information in it. The Tabular file ingest must be enabled. The variable information will be extracted from the files.
Do a search for one of the variables in the file (be sure to log out first.)
The search results will also include the restricted file.

I could reproduce this on demo.dataverse.org, version 6.7.1.
Search for "engine", and you will find my restricted file in the search results: https://demo.dataverse.org/dataverse/demo?q=%22engine%22&types=files&sort=score&order=desc&page=1

• When does this issue occur?
  Using basic search box.

• Which page(s) does it occurs on?
  Search results page.

• What happens?
  The search results will also include the restricted file.

• What did you expect to happen?

Users who are not logged in should not be able to see which variables are used within the restricted files.

Which version of Dataverse are you using?
6.5, and 6.71 (Harvard demo environment)

Any related open or closed issues to this bug report?
Not that I know of.

Start by reproducing the issue with Tabular file ingest enabled: upload a restricted Excel file containing variables, log out, and search for one of them. Trace the search-results path and metadata indexing or access checks; done means unauthenticated users no longer see restricted files through variable searches.