Kube Runner podSecurityContext not starting the container with this group

I am trying to set Kube Runner podSecurityContext as follow:
fsGroup: 1950
In order to be able to mount worker host volume - https://github.com/awslabs/amazon-eks-ami/issues/334

But the container which start not using this configruration at all
23:28 $ kubectl exec -it drone-huzeljokx7cpzlv0k0ef -c drone-7aofwkk2j7y9h3xi0i7t sh
/drone/src # id
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel),11(floppy),20(dialout),26(tape),27(video)