Backup Point Loses Integrity Status when Replicated to External Storage

I've been trying to troubleshoot some strange behaviors I've been seeing with the backup app. (e.g. #163, #114). I completely reset the backup app yesterday and started over with a full. My AppData location is within my NextCloud primary filesystem location - /data/nextcloud. I have an External Storage location defined as /data/nextcloud-backups/restore-points.

Yesterday I manually kicked off a full backup which completed successfully with a green checkbox and state of "unpacked". I then packed it manually and it maintained a green checkbox. Overnight, the logic that replicates it to the external storage happened as expected. When the replication was complete and I checked this morning, the backup status now has a issue of "cannot confirm integrity". I ran a backup:point:details on both the local and the external copy of the point and both verified fine. I've done nothing else manually to the backups.

I think this is different than #114.

Start by reproducing the reported flow: create a full backup, pack it, replicate it to the external storage location, and compare the local and replicated integrity status. Use backup:point:details on both copies, as described in the issue, and trace why replication changes the app's status to "cannot confirm integrity" despite both copies verifying successfully. Done means replicated points retain a confirmed integrity status.