And this is commvault support...premier support contract, 1 hour response time for critical tickets.
Ticket opened at 10:25AM:

Then it’s 11:25AM UTC, and ...tada…they just change the time , without contacting customer:
occur on or by Apr 22, 2021 2:36 PM (UTC)
Then it’s 11h38, and ...tada...another hour added..

Seems Commvault has flexible hours on their clocks.