If Cloud Guard detects an issue again for:
An Open (unresolved) problem, it updates the problem history, but doesn't create a new problem.
A previouslysolved problem, it reopens the issue and updates the history.
A previously dismissed problem, it updates the history.
https://docs.oracle.com/en-us/iaas/cloud-guard/using/problems-page.htm

Explanation
Graphical user interface, text, application, email Description automatically generated

https://docs.oracle.com/cd/E11857_01/install.111/e15311/agnt_install_windows.htm

Explanation
Oracle Cloud Infrastructure Vault is a managed service that lets you centrally manage the encryption keysthat protect your data and the secret credentials that you use to securely access resources. Vaults securely store master encryption keys and secrets that you might otherwise store in configuration files or in code.
Specifically, depending on the protection mode, keys are either stored on the server or they are stored on highly available and durable hardware security modules (HSM) that meet Federal Information Processing Standards (FIPS) 140-2 Security Level 3 security certification.
https://docs.oracle.com/en-us/iaas/Content/KeyManagement/Concepts/keyoverview.htm