Strange Backup behavior with mail

Hi,
We have recently started using CWP and found a strange issue with the backup.

We can see the e-mail is on /var/vmail and the accounts are on /home.
We configured the backup to /backups (incremental).

What we can see when the backup starts
1 - the backup script rsyncs /var/mail/domain to /home/domain/vmail
2 - the backup script rsyncs /home/domain to /backups
3 - the backup script deletes /home/domain/vmail

So what's the point of number 1?
If we have 200GB of e-mail it takes hours, every day to run an incremental backup.

Is this a bug?
We are using latest version.

Nobody has the same issue?

version *43 restore 2GB email
but not showing all email
i think only about 1 GB email

i think it's same problem

Yes,
Looks the backup is broken or at least not reliable.

agree
I've already posted about this, but still no respond