Replication issue 2.3.7

[Reio Remma]

Hello!

I noticed these in the logs since upgrading from 2.3.6. to 2.3.7:

Jul 13 11:52:10 turin dovecot: doveadm: Error: 
dsync-remote(reio at mrstuudio.ee)</1ekE7qbKV2gYwAAsNnMGQ>: Error: 
Exporting mailbox INBOX failed: Mailbox attribute 
vendor/vendor.dovecot/pvt/server/sieve/files/MR lookup failed: Mailbox 
attributes not enabled
Jul 13 11:52:11 turin dovecot: doveadm: Error: 
dsync-remote(reio at mrstuudio.ee)<MVs/K7ubKV2oYwAAsNnMGQ>: Error: 
Exporting mailbox INBOX failed: Mailbox attribute 
vendor/vendor.dovecot/pvt/server/sieve/files/MR lookup failed: Mailbox 
attributes not enabled

After turning on mailbox attributes these errors went away:

mail_attribute_dict = file:~/Maildir/dovecot-attributes

protocol imap {
     imap_metadata = yes
}

But now the errors are replaced with (when deleting mail):

Jul 13 12:04:32 turin dovecot: imap(reio at mrstuudio.ee): Warning: 
/home/vmail/mrstuudio.ee/reio/Maildir/dovecot-uidlist: Duplicate file 
entry at line 2: 1563008644.M18534P25946.orc.mrstuudio.ee,S=4180,W=4262 
(uid 23030 -> 23031) - retrying by re-reading from beginning
Jul 13 12:04:32 turin dovecot: imap(reio at mrstuudio.ee): Warning: Maildir 
/home/vmail/mrstuudio.ee/reio/Maildir: Expunged message reappeared, 
giving a new UID (old uid=23030, 
file=1563008644.M18534P25946.orc.mrstuudio.ee,S=4180,W=4262:2,S)

The mail message reappears on the other side of dsync and eventually I 
end up with 3 identical messages in trash after I've deleted them on 
both sides.

Thanks for any advice,
Reio