Show Multicast Counters on Arista eOS?

Hey all.

I have never had any luck with showing mcast counters on an Arista box. I was using a box that I know has mcast traffic on it, and using the show multicast fib ipv4 counters command just displays N/A for Byte and Packet on every interface. I never was able to show bytes/packets on an Arista box. I'm using 4.21.6F code if that matters.

Anyone have any insight on this by chance?

Thanks.