Steps to reproduce:

Have an agent running agent2.

The standard windows template contains an item Template Module Windows CPU by Zabbix agent active: Number of cores - key wmi.get[root/cimv2,"Select NumberOfLogicalProcessors from Win32_ComputerSystem"]

Result:

item "hostname:wmi.get[root/cimv2,"Select NumberOfLogicalProcessors from Win32_ComputerSystem"]" became not supported: Value of type "string" is not suitable for value type "Numeric (unsigned)". Value "HOSTNAME"

Expected:
The item should work. In my particular example it shows 2 with the traditional agent.

Hint:

Playing with zabbix_get and slightly modifying the query seems to show that agent2 actually gets more properties than asked for and that might cause confusion.

1. zabbix_get -s hostname -k 'wmi.getall[root/cimv2,Select NumberOfLogicalProcessors from Win32_ComputerSystem]'
   [\{"Name":"HOSTNAME","NumberOfLogicalProcessors":2}]

Doing the same with a traditional agent yielded (only the requested property):

1. zabbix_get -s hostname -k 'wmi.getall[root/cimv2,Select NumberOfLogicalProcessors from Win32_ComputerSystem]'
   [\{"NumberOfLogicalProcessors":2}]