Hung Kubernetes Runners

I am exploring Gitlab SAS with runners on kubernetes cluster. However when i perform helm update active runners with builds in progress get hung and the respective pods are not getting destroyed automatically.

[root@stg-cpt-jnk-slv-w2a-a gitlab]# kubectl get pods
NAME READY STATUS RESTARTS AGE
gitlab-runner-gitlab-runner-6b87cb7f87-zr2mw 1/1 Running 0 19h
runner-lyh1ijm-project-9966627-concurrent-0r4lc2 2/2 Running 0 19h
tiller-deploy-8cd966cd7-p992f 1/1 Running 0 9h

Please note the runner is active for more than 19h.

I think this is because helm update restarted the main gitlab runner, which makes other runnners disconnected from Gitlab. Can someone please clarify this behavior.

Thank You
Manoj