New modular template takes data using WMI get request, using key

wmi.getall[root\cimv2,"select * from win32_networkadapter where PhysicalAdapter=True"]

It allows to obtain more data and name discovered interfaces more nicely.

But, it's possible that it will return interfaces with identical names, which are used as unique part for item prototype keys. It leads that LLD rule gets failed and stop to work, as it tries to create duplicated items.

Here is example, GUI from windows:

And interfaces obtained by new and old ways, using zabbix_get:
zabbix_get_win32_networkadapter.txt
zabbix_get_net.if.discovery.txt

In the new way see names "HP NC382i DP Multifunction Gigabit Server Adapter" used for LAN1 and LAN2.

Note also that
"HP NC382i DP Multifunction Gigabit Server Adapter #11"
and
"HP NC382i DP Multifunction Gigabit Server Adapter #47"
for unknown reason are missing in the new way output.

All these troubles are not actual for old style of discovery - zabbix agent key 'net.if.discovery'

Probably related templates should be reviewed.