Files missing from remote storage. Then again, not

I received a report that said:

Failed: Found 2 files that are missing from the remote storage, please run repair
Details: Duplicati.Library.Interface.UserInformationException: Found 2 files that are missing from the remote storage, please run repair
 at Duplicati.Library.Main.Operation.FilelistProcessor.VerifyRemoteList (Duplicati.Library.Main.BackendManager backend, Duplicati.Library.Main.Options options, Duplicati.Library.Main.Database.LocalDatabase database, Duplicati.Library.Main.IBackendWriter log, System.String protectedfile) [0x001aa] in <ae134c5a9abb455eb7f06c134d211773>:0 
 at Duplicati.Library.Main.Operation.BackupHandler.PostBackupVerification () [0x00058] in <ae134c5a9abb455eb7f06c134d211773>:0 
 at Duplicati.Library.Main.Operation.BackupHandler.Run (System.String[] sources, Duplicati.Library.Utility.IFilter filter) [0x008e0] in <ae134c5a9abb455eb7f06c134d211773>:0 
 at Duplicati.Library.Main.Controller+<>c__DisplayClass17_0.<Backup>b__0 (Duplicati.Library.Main.BackupResults result) [0x00036] in <ae134c5a9abb455eb7f06c134d211773>:0 
 at Duplicati.Library.Main.Controller.RunAction[T] (T result, System.String[]& paths, Duplicati.Library.Utility.IFilter& filter, System.Action`1[T] method) [0x00072] in <ae134c5a9abb455eb7f06c134d211773>:0

Then two days later that same system (without me having done anything about it) said:

DeletedFiles: 0
DeletedFolders: 0
ModifiedFiles: 15
ExaminedFiles: 190535
OpenedFiles: 15
AddedFiles: 0
SizeOfModifiedFiles: 197469133
SizeOfAddedFiles: 0
SizeOfExaminedFiles: 234050313203
SizeOfOpenedFiles: 197469671
NotProcessedFiles: 0
AddedFolders: 0
TooLargeFiles: 0
FilesWithError: 0
ModifiedFolders: 0
ModifiedSymlinks: 0
AddedSymlinks: 0
DeletedSymlinks: 0
PartialBackup: False
Dryrun: False
MainOperation: Backup
ParsedResult: Success
VerboseOutput: False
VerboseErrors: False
EndTime: 4/16/2019 5:24:21 PM (1555428261)
BeginTime: 4/16/2019 5:14:55 PM (1555427695)
Duration: 00:09:26.5734530
Messages: [
   [Retention Policy]: Start checking if backups can be removed,
   [Retention Policy]: Time frames and intervals pairs: 7.00:00:00 / 1.00:00:00, 28.00:00:00 / 7.00:00:00, 365.00:00:00 / 31.00:00:00,
   [Retention Policy]: Backups to consider: 4/14/2019 2:41:31 PM, 4/12/2019 1:00:00 PM, 4/11/2019 11:13:17 AM, 4/9/2019 1:00:00 PM, 4/7/2019 2:46:11 PM, 3/30/2019 4:04:14 PM, 3/23/2019 12:00:00 PM, 3/12/2019 4:28:21 PM, 2/2/2019 11:25:06 AM, 12/24/2018 12:00:00 PM, 11/22/2018 12:00:00 PM, 10/17/2018 9:23:33 PM, 9/15/2018 3:25:03 PM, 6/10/2018 12:00:00 PM, 5/6/2018 9:03:08 PM,
   [Retention Policy]: Backups outside of all time frames and thus getting deleted: ,
   [Retention Policy]: All backups to delete: 4/9/2019 1:00:00 PM,
   Deleting 1 remote fileset(s) ...,
   Deleted 1 remote fileset(s),
   Compacting not required
]
Warnings: []
Errors: []

How is that possible. Is the archive OK or not?

This machine is at another location and checking is a lot of work.

This is Duplicati 2.0.3 (not updated because I was afraid for performance problems that were reported with the 2.0.4 beta) on macOS.

Changed the title to be a little more descriptive. Somebody has an explanation?