Issue that customer faced :

A customer recently encountered an issue in a production cluster where a custom ACS policy was unexpectedly terminating Multus pods. This issue is explained in the KCS below. It would be helpful to update the RHACS documentation to include a NOTE or an important statement advising against applying custom policies to default OCP pods and namespaces.

https://access.redhat.com/solutions/7109197

Documentation referring : https://docs.openshift.com/acs/4.6/operating/manage_security_policies/custom-security-policies.html