Multicast with E1000 vs. VMXNet 3

Hello,

I am troubleshooting an issue with multicast. I've noticed that if I use the VMXNet 3 driver, my guest cannot see multicast traffic. If I use the E1000 driver, the guest can see multicast traffic.  I have searched and cannot find any information about problems with multicast and VMXNet 3.  Has anyone seen this behavior before?

Thanks,

Dennis