MikroTik Problem with Snmpv3

Hi all,

I have a problem with Mikrotik SnmpV3 with Zabbix
i have connection time out in zabbix for Mikrotik
When add two Mikrotik, there isn’t no problem
but when add 3 Mikrotik, Connection time out error in zabbix and can’t monitor mirotik in zabbix
My Mikrotik: 6.49.10
Zabbix Proxy: 6.4.5