cannot delete a blobstore if repository healthcheck was enabled on a repo that used it

1. Create a new file blobstore
2. create a new repo using the new blobstore and enable repo healthcheck ( click Analyze )
3. Wait for the new System - Repository Health Check to run at least once, or manually run it
4. Delete the repo
5. Delete the blobstore

Outcome

The blobstore is not fully deleted - the nexus.log contains a message like this:

2022-01-12 09:32:54,457-0400 WARN [qtp1997583413-128] admin org.sonatype.nexus.blobstore.file.FileBlobStore - Unable to delete non-empty blob store content directory /sonatype-work/nexus3/blobs/to-delete/content

The only "content" remaining in the blobstore is under ./content/directpath/health-check/

Expected

Deleting a blobstore should not be prevented by files which are no longer in use ( remember repo was deleted! ).