Why does the Controller fail the Health Check with Status: Critical?

[#1]

Why does the Controller fail the Health Check with Status: Critical when it's installed with DB Aurora RDS?

Issue

When a Controller is installed into an AWS EC2 with Aurora RDS, the bin/platform-admin.sh show-service-status --service Controller returns the following status, even though the Controller checks out fine in all of the logs: 

Health Status: Critical
Health: Critical

Why is this happening?

This appears to be an issue in the health check mechanism and is being investigated by engineering.