K3s cluster unavailable after 1 node goes down

I have installed a 2 nodes k3s cluster using an external DB. Installed rancher also on it. The problem i am having is that if i shutdown 1 node Rancher becomes unavailable for around 6 minutes. After this time rancher is back again and the Cluster is all working.
Is this expected, shouldn’t the cluster be available with 1 node when using external DB?