test:
[sig-network] NetworkPolicy [LinuxOnly] NetworkPolicy between server and client should enforce policy based on NamespaceSelector with MatchExpressions[Feature:NetworkPolicy] 

is failing frequently in CI, see search results:
https://search.svc.ci.openshift.org/?maxAge=168h&context=1&type=bug%2Bjunit&name=&maxMatches=5&maxBytes=20971520&groupBy=job&search=%5C%5Bsig-network%5C%5D+NetworkPolicy+%5C%5BLinuxOnly%5C%5D+NetworkPolicy+between+server+and+client+should+enforce+policy+based+on+NamespaceSelector+with+MatchExpressions%5C%5BFeature%3ANetworkPolicy%5C%5D

FIXME: Replace this paragraph with a particular job URI from the search results to ground discussion.  A given test may fail for several reasons, and this bug should be scoped to one of those reasons.  Ideally you'd pick a job showing the most-common reason, but since that's hard to determine, you may also chose to pick a job at random.  Release-gating jobs (release-openshift-...) should be preferred over presubmits (pull-ci-...) because they are closer to the released product and less likely to have in-flight code changes that complicate analysis.