Not detect and read Stack Port in Stack V mode

Hi 

We using extreme switch x670 and X460-24p in Stack-V mode. Soft version 16.2.5.4Patch-1.30 but snmp does not read stack port utilization ( Not detecting stack port ). Can you help with this problem ? This is important information about monitoring Stack Port. On x590, x690 and x695 observium recognizing and display propertly stack port in normal mode and alternative.

BR

Paweł