rancher: deployments.apps "cattle-cluster-agent" not found ... dial tcp 127.0.0.1:6080: connect: connection refused seen after provisioning cluster

What kind of request is this (question/bug/enhancement/feature request): bug

Steps to reproduce (least amount of steps as possible): Create a new Cluster with AWS EC2 Template. Rancheros is used as ami as described in the documentation All ports were opened up during provisioning from rancher resulting in security group rancher-nodes

Result: After provisioning everything comes up. The health check results in:

Cluster health check failed: deployments.apps “cattle-cluster-agent” not found; Error while applying agent YAML, it will be retried automatically: exit status 1, Error from server (InternalError): an error on the server (“dial tcp 127.0.0.1:6080: connect: connection refused”) has prevented the request from succeeding

Environment information

• Rancher version : 2.5.1
• Installation option (single install/HA): HA

Cluster information

• Cluster type (Hosted/Infrastructure Provider/Custom/Imported): Infrastructure Provider AWS

• Machine type (cloud/VM/metal) and specifications (CPU/memory): cloud

• Kubernetes version (use kubectl version): 1.19.3

• Docker version (use docker version): 19.3.11