We are running zabbix 5 LTS with MariaDB and exactly 2 minutes after zabbix-server start, we have many entries

Code:
[Z3005] query failed: [4031] The client was disconnected by the server because of inactivity. See wait_timeout and interactive_timeout for configuring this behavior. [select h.hostid,h.status,h.tls_accept,h.tls_issuer,h.tls_ subject,h.tls_psk_identity,a.host_metadata,a.liste n_ip,a.listen_dns,a.listen_port,a.flags from hosts h left join autoreg_host a on a.proxy_hostid is null and a.host=h.host where h.host='notebook' and h.status in (0,1) and h.flags<>2 and h.proxy_hostid is null]
[Z3005] query failed: [4031] The client was disconnected by the server because of inactivity. See wait_timeout and interactive_timeout for configuring this behavior. [begin;]
in our log.

it looks like the obvious but it is not

Code:
mysql> show variables like 'wait_timeout';
--------------------+

--------------------+

--------------------+
1 row in set (0,00 sec)

mysql> show variables like 'interactive_timeout';
--------------------------+

--------------------------+

--------------------------+
1 row in set (0,00 sec)
We tried to tune almost everything that can be tweaked without any change.

It seems there is some internal zabbix timeout, that is hitting us right after 2 minutes.