I have worked around the issue, but I need your advice on how to definitively solve the issue.
The problem is in the MySQL ODBC driver version 8.0.12. By downgrading the package to 8.0.11-1, solves the issue. For CentOS 6 users, they can just run “yum downgrade mysql-connector-odbc-8.0.11-1.el6” and then restart asterisk.
Where should be this issue reported? Asterisk or MySQL?