Steps to reproduce:

1. In "Template Module Windows network by Zabbix agent",  item "Network interfaces WMI get" ,  key "wmi.getall[root\cimv2,"select Name,Description,NetConnectionID,Speed,AdapterTypeId,NetConnectionStatus from win32_networkadapter where PhysicalAdapter=True and NetConnectionStatus>0"]" 
2. My client is a HPE 380 Gen9 , and its network adapter is one adapter with four ports. So I get the following result:

3. // code placeholder
   PS C:\Users\Administrator> Get-WmiObject -Namespace root\cimv2 -Query "select Name,Description,NetConnectionID,Speed,Ada
   pterTypeId,NetConnectionStatus from win32_networkadapter where PhysicalAdapter=True and NetConnectionStatus>0"
   __GENUS             : 2
   __CLASS             : Win32_NetworkAdapter
   __SUPERCLASS        :
   __DYNASTY           :
   __RELPATH           :
   __PROPERTY_COUNT    : 6
   __DERIVATION        : {}
   __SERVER            :
   __NAMESPACE         :
   __PATH              :
   AdapterTypeId       : 0
   Description         : HPE Ethernet 1Gb 4-port 331i Adapter
   Name                : HPE Ethernet 1Gb 4-port 331i Adapter
   NetConnectionID     : Embedded LOM 1 Port 1
   NetConnectionStatus : 2
   Speed               : 1000000000
   PSComputerName      :
   
   __GENUS             : 2
   __CLASS             : Win32_NetworkAdapter
   __SUPERCLASS        :
   __DYNASTY           :
   __RELPATH           :
   __PROPERTY_COUNT    : 6
   __DERIVATION        : {}
   __SERVER            :
   __NAMESPACE         :
   __PATH              :
   AdapterTypeId       :
   Description         : HPE Ethernet 1Gb 4-port 331i Adapter
   Name                : HPE Ethernet 1Gb 4-port 331i Adapter
   NetConnectionID     : Embedded LOM 1 Port 4
   NetConnectionStatus : 4
   Speed               :
   PSComputerName      :
   
   __GENUS             : 2
   __CLASS             : Win32_NetworkAdapter
   __SUPERCLASS        :
   __DYNASTY           :
   __RELPATH           :
   __PROPERTY_COUNT    : 6
   __DERIVATION        : {}
   __SERVER            :
   __NAMESPACE         :
   __PATH              :
   AdapterTypeId       :
   Description         : HPE Ethernet 1Gb 4-port 331i Adapter
   Name                : HPE Ethernet 1Gb 4-port 331i Adapter
   NetConnectionID     : Embedded LOM 1 Port 3
   NetConnectionStatus : 4
   Speed               :
   PSComputerName      :
   
   __GENUS             : 2
   __CLASS             : Win32_NetworkAdapter
   __SUPERCLASS        :
   __DYNASTY           :
   __RELPATH           :
   __PROPERTY_COUNT    : 6
   __DERIVATION        : {}
   __SERVER            :
   __NAMESPACE         :
   __PATH              :
   AdapterTypeId       :
   Description         : HPE Ethernet 1Gb 4-port 331i Adapter
   Name                : HPE Ethernet 1Gb 4-port 331i Adapter
   NetConnectionID     : Embedded LOM 1 Port 2
   NetConnectionStatus : 4
   Speed               :
   PSComputerName      :

Expected:

1. From the result we find four ports have same name and description, and just connectionID is different. In the Discovery Rule, all item keys are identified by name. As a result three ports data are discarded and in host items just one port data  is showing