Thank you for reaching out. Also, appreciate the added details.
This definitely needs a review to confirm the behaviour.
Suggesting a support case be raised for us to review this for you. We will require additional details such as Commvault service pack levels, MS patches installed during the recent update and Commvault logs for analysis.
You can contact us via -
Phone Support - https://ma.commvault.com/Support/TelephoneSupport
or via Maintenace Advantage - https://ma.commvault.com/
Customer Support Supervisor.