IPV4 address assignment with dhcp is not working with dual stack VM.

Description:

IPV4 address assignment with dhcp is not working with dual stack VM when IPV4 subnet created after ipV6 Subnet created.

1. Create Network,Subnet(SLAAC), Port and boot VM.
2. Create Router and add IPV6 subnet to it and check IPV6 address assigned in VM.
2. Create Second subnet(IVv4 with DHCP enabled) and boot VM.

Expected Result:

Both new VM's and existing VM should get IPV4 address. But, existing VM's which are part of IPV6 subnet not got any IPV4 address.

Observation:

Similar test done with IPV6 and IPV6 address got assigned with all VM's.