Using following SNMP Auth Method:

• SNMPv3
  • • AuthPriv
• AUTHPRIV PW in a Global Macro => {$DEVICE_SNMP_AUTHPASS}
• PRIVPASS PW in a Global Macro => {$DEVICE_SNMP_PRIVPASS}

Steps to reproduce:

1.  Going to Administrator => General => Macros
2.  Changing the SNMP PASS in Macro (either {$DEVICE_SNMP_AUTHPASS} or {$DEVICE_SNMP_PRIVPASS})
3. The Zabbix SNMPv3 will not take over the new Password which is stored in the Macro
4. We MUST restart the whole Zabbix Server to bring up and running the SNMPv3 connections again

Result:
Without restarting the Zabbix Server (v4.4 and 5.0), the status of the device never will change back to "host became available", if we do not restart the Zabbix Server after changing SNMP PW's in the Macros.

The monitored devices remains in the status: "host unavailable"

Expected:
That the changed password will be taken over in the SNMPv3 Config