Redshift Serverless Workgroup crashed and now Namespace metrics for are unavailable. How to recover?

We had a very interesting but worrying incident with a staging environment in Redshift Serverless. Upon execution of a stored procedure that used DDL, Redshift Serverless got stuck in an unusable state.

• According to pg_locks, there were several locks on the various tables used in the procedure. The accompanying processes could not be terminated
• There were no running queries anymore.
• I couldn't drop the schema or tables because of the aforementioned table locks.
• Looking at resource monitoring, the Redshift Serverless Workgroup was using max RPU resources at a constant rate.
• After a while, no connection could be made anymore to the workgroup, everything was just completely unresponsive.
• As a last resort, the workgroup was destroyed and a new workgroup was attached to the namespace.

This seems to have worked, the behaviour is normal again. However, all Cloudwatch metrics related to the namespace have stopped reporting since the incident. Meaning we can't currently monitor storage or resource usage, there is just no data available.

So my question is twofold:

• Is there any way to recover Cloudwatch metrics operation for this namespace?
• How could this have happened and more importantly, prevented? It seems quite worrying Redshift Serverless could end up in such a condition without having the right tools to resolve the incident.