Unified Audit Policy Exclusion Issue (Oracle 19c)

I've implemented a custom Unified Audit Policy in an Oracle 19c container database (Version 19.28.0.0.0) and am encountering an issue where excluded users are still being audited.

Problem Description

I created and enabled a custom unified audit policy, and then attempted to exclude specific users from being audited using the NOAUDIT statement. However, these excluded users still appear in the UNIFIED_AUDIT_TRAIL.

Steps Taken

1. Created and Enabled Custom Policy:

-- Example of enabling the policy
AUDIT POLICY AUDIT_POLICY_NAME;

2. Attempted to Exclude Users:

NOAUDIT POLICY AUDIT_POLICY_NAME BY user1, user2, user3;

3. Checked Policy Status: Querying AUDIT_UNIFIED_ENABLED_POLICIES