Firebolt change history: Engines may fail to start and stop

Firebolt reported a major incident in which engines could fail to start or stop, beginning 2021-07-20 04:30 UTC and lasting 4 h 20 min. Firebolt attributed it to unidentified issues on AWS’s side and confirmed resolution there at 2021-07-20 08:50 UTC, restoring engine start/stop functionality.