This incident has been resolved.

We've completed moving all customer deployments onto new deployment hosts

We've been able to procure some new deployment hosts that are operating normally in ap-east-1b and are working on moving customer deployments onto them.

We are currently experiencing issues in our AWS ap-east-1 region, in the ap-east-1b zone. We are monitoring the situation and working to minimize the impact for customers where possible. Customers may see higher latency while connecting to their deployments and deployment changes may fail during this time.