Replication CRC error

[Konstantin Udalov]

Hello.

I configured IMAP rolling replication from master to slave as was 
described in https://cyrusimap.org/imap/admin/sop/replication.html And 
everything was fine. Until some strange records appear into logs. Here 
is one of them.

Mar  2 04:48:55 hostname cyrus/sync_client[725]: MAILBOX received NO 
response: IMAP_SYNC_CHECKSUM Checksum Failure
Mar  2 04:48:55 hostname cyrus/sync_client[725]: CRC failure on sync for 
shared.folder.name, trying full update
Mar  2 04:49:08 hostname cyrus/sync_client[725]: SYNCERROR: only exists 
on master shared.folder.name 286227 
(d41e384300c3f13f42a546ce14ec3d23bc89f1a6)
Mar  2 04:49:13 hostname cyrus/sync_client[725]: SYNCERROR: only exists 
on master shared.folder.name 286227 
(d41e384300c3f13f42a546ce14ec3d23bc89f1a6)
Mar  2 04:49:13 hostname cyrus/sync_client[725]: mailbox: longlock 
shared.folder.name for 11.4 seconds

I stopped rolling replication and launched full (-A) replication. No 
more related records in logs, still message 286227 wasn't replicated and 
is missing on replica.
If somebody faced same problem, help would be much appreciated.

cyrus-imap 2.5.3