High number of redundant kubeproxy rules is noticed in RHOCP4 since version 4.15 with OpenshiftSDN

Issue

• Why are the alerts NodeProxyApplySlow and ClusterProxyApplySlow firing in RHOCP 4.15 with OpenshiftSDN network plugin?

• Why is there a high quantity of redundant kubeproxy rules in the OCP nodes since RHOCP 4.15?

  $ iptables -nvL -t nat | grep 'masquerade traffic for openshift-ingress'
  0     0 KUBE-MARK-MASQ  all  --  !tun0  *       0.0.0.0/0            0.0.0.0/0            
  /* masquerade traffic for openshift-ingress/router-nodeport-<svc-name>:http external destinations */
  0     0 KUBE-MARK-MASQ  all  --  !tun0  *       0.0.0.0/0            0.0.0.0/0 
  /* masquerade traffic for openshift-ingress/router-nodeport-<svc-name>:http external destinations */
  0     0 KUBE-MARK-MASQ  all  --  !tun0  *       0.0.0.0/0            0.0.0.0/0 
  /* masquerade traffic for openshift-ingress/router-nodeport-<svc-name>:http external destinations */
  [...]
  $ iptables -nvL -t nat | grep 'masquerade traffic for openshift-ingress' | wc -l
  289530 <----- High quantity of duplicate rules