Task "Compact Blob Store" does not reclaim disk space

Nexus Repository Manager
1

We have a large maven-snapshots repository with over 3 TB of reclaimable bytes, but nothing is deleted from disk when we run the “Compact blob store” task.

Output from the nx-blob-repo-space-report script (https://support.sonatype.com/hc/en-us/article_attachments/6138506837267/nx-blob-repo-space-report-20220510.groovy):

"maven-snapshots": {
	"reclaimableBytes": 3381780825366,
	"totalBytes": 3464385015422
}

Task log:

2023-02-03 14:55:21,685+0100 INFO  [quartz-11-thread-19]  *SYSTEM org.sonatype.nexus.blobstore.compact.internal.CompactBlobStoreTask - Task information:
2023-02-03 14:55:21,688+0100 INFO  [quartz-11-thread-19]  *SYSTEM org.sonatype.nexus.blobstore.compact.internal.CompactBlobStoreTask -  ID: e39ab0a2-cd8d-4594-b21a-bedbe47b00b1
2023-02-03 14:55:21,688+0100 INFO  [quartz-11-thread-19]  *SYSTEM org.sonatype.nexus.blobstore.compact.internal.CompactBlobStoreTask -  Type: blobstore.compact
2023-02-03 14:55:21,688+0100 INFO  [quartz-11-thread-19]  *SYSTEM org.sonatype.nexus.blobstore.compact.internal.CompactBlobStoreTask -  Name: Compact blob store (delete artifacts from disk)
2023-02-03 14:55:21,688+0100 INFO  [quartz-11-thread-19]  *SYSTEM org.sonatype.nexus.blobstore.compact.internal.CompactBlobStoreTask -  Description: Compacting default blob store
2023-02-03 14:55:21,688+0100 INFO  [quartz-11-thread-19]  *SYSTEM org.sonatype.nexus.blobstore.file.FileBlobStore - Begin deleted blobs processing
2023-02-03 14:55:34,998+0100 INFO  [quartz-11-thread-19]  *SYSTEM org.sonatype.nexus.blobstore.file.FileBlobStore - Removed 0 empty directories from /nexus-data/blobs/default/content/directpath
2023-02-03 14:55:34,999+0100 INFO  [quartz-11-thread-19]  *SYSTEM org.sonatype.nexus.blobstore.compact.internal.CompactBlobStoreTask - Task complete

Any known causes for the task to not find these artifacts? Are there other ways of reclaiming bytes than running the “Compact blob store” task?

Thanks in advance!
Best regards,
Marius