We upgraded to Horizon View 7.3.1 and we have a few instant clone pools that have the network port group not the same as the parent VM. Previously in 7.2 and 7.1 this was fine, but since going to 7.3.1 the network card on the VMs would be blocked by the port group security unless we switch the security on the port groups to:
MAC address changes: accept
Forged Transmits: accept
Obviously this isn't ideal, so does anyone have any ideas why this would have happened or any suggestions on a workaround other than changing the security settings on the port groups?