Steps to reproduce:

1. I configure a host with SNMP v1 and SNMP community ("senati" for example).
2. In Zabbix dashboard select: configuration>host>(select created host).
3. In the interfaces select:

          SNMP version: SNMPv1

          SNMP community: {$SNMP_COMMUNITY}

      4. Select Update.

      5. In Zabbix, The SNMP doesn't change to enable.

      6. But, in the interfaces select:

          SNMP version: SNMPv1

          SNMP community: senati

      7. In Zabbix, The SNMP change to enable.

Result:

 

Expected: