I believe this is expected - after a linked clone is created, its network settings are preserved across refresh/recompose operations. From View documentation:

"During View Composer recompose and rebalance operations, a best effort is made to ensure that the network label of each NIC attached to each linked-clone desktop is preserved when a linked clone inherits new NICs from a new base image. View preserves the network label of a NIC that was in place before the recompose or rebalance operation as long as the new base image has an available NIC configured with the same type of network switch. (A NIC can be configured with a standard network switch or distributed virtual network switch.)"