Very strange MYSQL replication problem. MASTER_LOG_POS changes very fast with Webmin/Virtualmin installed

SYSTEM INFORMATION
OS type and version Ubuntu 20.04
Webmin version 2.001
Virtualmin version 7.2-1
Related packages SUGGESTED

Hi there, I have a problem with MYSQL replication.

I use Webmin/Virtualmin with Ubuntu OS

The MASTER_LOG_POS is changed very fast and I can’t set up replication.

CHANGE MASTER TO
MASTER_HOST=‘IP’,
MASTER_USER=‘rep’,
MASTER_PASSWORD=‘Password’,
MASTER_LOG_FILE=‘mysql-bin.000004’,
MASTER_LOG_POS=3345884;

I success in setup once, and replication was working until the position changed again.

Then I get an error:Last_Error: Coordinator stopped because there were error(s) in the worker(s). The most recent failure being: Worker 1 failed executing transaction ‘ANONYMOUS’ at master log mysql-bin.000004, end_log_pos 3346397. See error log and/or performance_schema.replication_applier_status_by_worker table for more details about this failure or others, if any.

Could you please help me with this? Thanks