If the SMMR contains an asterisk in the members field and you delete this SMMR, the SMMR controller doesn't clean up the member namespaces. The ServiceMeshMember resource is retained and so are the other resources that the SMMR controller installs in the member namespace (RoleBindings, NetworkPolicies, Namespaces label, etc.)

This causes problems if you also delete the SMCP and then create a new SMCP with a different name, and then include the same namespaces as members. The existing SMMs point to the old SMCP (by name).