I might be mistaken but promiscuous mode will not copy traffic from other hosts at all promiscuous mode simply allows a machine to access all traffic on all NICs on a host. So the behaviour you're encountering seems normal. You probably want to look at Port Mirroring to achieve what you're looking for (https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.networking.doc/GUID-CFFD9157-FC17-4...)
