Steps:
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openstack security group create sg1
openstack security group rule create sg1 --egress --ethertype IPv4 --protocol icmp --remote-group sg1
openstack security group rule create sg1 --egress --ethertype IPv6 --protocol icmp --remote-group sg1
openstack security group rule create sg1 --ingress --ethertype IPv4 --protocol icmp --remote-group sg1
openstack security group rule create sg1 --ingress --ethertype IPv6 --protocol icmp --remote-group sg1

openstack network create network1
openstack subnet create --network network1 --subnet-range 10.0.0.0/24 subnet1

openstack server create --flavor m1.tiny --availability-zone nova:osc-pike-ubuntu16 --image cirros-0.3.5-x86_64-disk --nic net-id=network1 VM1 --security-group sg1

openstack server delete VM1

Issue:
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Stale flows with VM IP's are observed in ACL tables 216 and 246.