The workerAdditionalCerts variable is set but the certs are not getting added to the worker pods. You can see the worker-certs secret is added to the worker but it has no effect
A volume / volume mount using the worker-certs secret is missing from the template
This has been fixed in Concourse Helm chart version v7.4.1
A conditional worker-additional-certs volume and a matching volumeMount added to both the worker StatefulSet and Deployment templates