OVNKubernetes network OSSM Authorization Policy Failed in applying Allow GET HTTP methods

When we test the OSSM 1.1.16.2 in an OVNKubernetes network OCP environment, we see a random failure in OSSM Authorization Policy for HTTP traffic case. The Authorization Policy was not always applied properly.

We tested the same test case and does not see any failure in an OpenShiftSDN network OCP environment.

ovn-kubenode Pod ovn-kubenode Container log:

2904 ovs.go:168] exec(27): stderr: "Error: ipv4: FIB table does not exist.\nDump terminated\n"

ovs-node pod log:
2021-07-21T15:44:11.368Z|00127|bridge|ERR|interface br-ex: ignoring mac in Interface record (use Bridge record to set local port's mac)
2021-07-21T15:44:11.374Z|00128|bridge|ERR|interface br-ex: ignoring mac in Interface record (use Bridge record to set local port's mac)

Build Info:
OCP version:   4.6.39 
network:           OVNKubernetes
ovn rpm version:
ovn2.13-20.12.0-24.el8fdp.x86_64
ovn2.13-vtep-20.12.0-24.el8fdp.x86_64
ovn2.13-host-20.12.0-24.el8fdp.x86_64
ovn2.13-central-20.12.0-24.el8fdp.x86_64

OSSM operator version:  2.0.6.2
SMCP version: 1.1.16.2

Test case :
https://istio.io/v1.6/docs/tasks/security/authorization/authz-http/
https://github.com/maistra/maistra-test-tool/blob/maistra-2.0/tests/task_security_authorization_http_test.go
https://polarion.engineering.redhat.com/polarion/#/project/MaistraIstio/workitem?id=MAIST-456

How to reproduce:
1. Create an OCP cluster with OVNKubernetes network type in install-config.yaml
2. Deploy OSSM 2.0.6.2 operator and create SMCP 1.1.16.2
3. Follow the Test case steps above and check sample application Bookinfo productpage after each Authoriation Policy configuration.
4. Check RBAC access denied response as expected after applying RBAC denied policy
5. Check productpage response failed after applying Allow HTTP GET policy