The init container crashes, with the below logs:
chown: /var/lib/grafana: Operation not permitted
chown: /var/lib/grafana: Operation not permitted
This is bug/feature of the way the dynamic PVs are provisioned, and will affect any container that attempts to chown, and has to be fixed on the container/helm side.
problem can be fixed by deleteing Grafana init container.
References
https://www.reddit.com/r/grafana/comments/nj0p31/grafana_pod_is_in_init_error_state_after_adding/
https://github.com/kubernetes-sigs/aws-efs-csi-driver/issues/300