Kubernetes Namespaces & Workdload Not visible

I’m facing a very skeptical issue. I have kubernetes HA cluster on bare metal - 3 master, 4 data nodes and 3 external etcd. Issue is - when i installed the Rancher 2.3.4 first time and imported the kubernetes cluster, it showed all the namespaces( kube-system, cattle-system, …) under system project with the number of pod running on each node. But when i stopped and restarted the Rancher container and again imported the kubernetes cluster, Rancher did not show any namespaces which it showed at the first time. I even tried removing the Rancher’s namespace cattle-system and re-deploying it, but nothing worked.

**Rancher version 2.3.4
Kubelet 1.17
Docker 19.03