Issue:

Changes to a policy dosen't take effect on tables where the policy is already applied

Symptom:

Yo have a policy for Table X that let admins and superusers do everything, but users are only admitted to read. You changed this policy so that users are not allowed to read. You log in with a user who are member of only the users-group. However, Table X is still visible and thus the policy is *not applied.*

Solution:

Remove the policy, save, and re-apply the policy.