This incident has been resolved. Capella Operational Cluster lifecycle operations in AWS us-west-2, including new cluster creation, turn-on, and backup, are operating normally.
The issue was caused by elevated EC2 instance launch failures in the AWS us-west-2 region, which AWS attributed to an issue with its EBS service.
AWS us-west-2 instance launch failures are intermittently impacting Operational Cluster lifecycle operations, including new cluster creation, turn-on, and backups.