The Istio task: TCP traffic shifting
part 2 Transfer 20% of the traffic from tcp-echo:v1 to tcp-echo:v2 test case failed.
We didn't see the expected v2 "two .... " result. after applying the tcp-echo-20-v2.yaml.

This test case passed in maistra-0.7.0 OCP 3.11 and upstream release 1.1 snapshot 6 OCP 3.11 environments. And it failed in the following setup:

Build: istio maistra-0.8.0
Environment: OCP 3.11
OCP console: https://tmor2-master.bc.jonqe.lab.eng.bos.redhat.com:8443/console/catalog

Test steps: https://preliminary.istio.io/docs/tasks/traffic-management/tcp-traffic-shifting/
Test script: https://github.com/yxun/maistra-ocp-istio-test-tool/blob/master/tests/maistra/tc_06_tcp_traffic_shifting_test.go

Results:
— FAIL: Test06 (282.45s)
— PASS: Test06/100%_v1_shift (81.84s)
— FAIL: Test06/20%_v2_shift (81.90s)
tc_06_tcp_traffic_shifting_test.go:132: Failed traffic shifting test for 20 percent. v1 version hit 20, v2 version hit 0