Problem with trigger Template DB MySQL

[d1mf]

Hello. I have a strange moment. I install the latest version Zabbix server 4.2
I install MariaDB 10.3 to my server linux. An agent working correct and I see item mysql.
If I stop mysql server trigger not send an alert (about problem mysql)
After stop mysql service Zabbix just shows the message about.
Possible configure a trigger for send alert if mysql service down?

[d1mf]

I find a solution. Need to enable unsupported item.