Action not done in container-scenarios when action is not "kill 1"

[lupul-cel-bun]

In https://github.com/krkn-chaos/krkn-hub/blob/main/docs/container-scenarios.md, one understands that ACTION may take values form 1 to 9.
In the demo we have ACTION="kill 1"

"kill 1" kills a container, but "kill 9" does not
"kill 1" kills a container, but "1" does not

Please advise.

Infrastructure provider
VSphere
OpenShift version
4.12.42

$ podman images
REPOSITORY                      TAG                  IMAGE ID      CREATED        SIZE
quay.io/redhat-chaos/cerberus   latest               3ad8a81258d9  10 months ago  1.16 GB
quay.io/openshift-scale/kraken  container-scenarios  242e805f50a2  2 years ago    2.23 GB

Running kill 1 works

export CERBERUS_ENABLED=true  
export CERBERUS_URL=http://0.0.0.0:8080                                   
export NAMESPACE=openshift-etcd                                           
export LABEL_SELECTOR=k8s-app=etcd                                        
export DISRUPTION_COUNT=1                                                 
export ACTION="kill 1"
export ENABLE_ALERTS=True 
export EXPECTED_RECOVERY_TIME=180 
export WAIT_DURATION=90   #next scenario execution looks at cerberus and expects healty clusters for OK to go signal.
export DAEMON_MODE=false


podman run --privileged \
--name=krkn \
--net=host \
--env-host=true \
-v /root/.kube/config:/root/.kube/config:Z \
-d quay.io/openshift-scale/kraken:container-scenarios 

I have tried out various combinations and only "kill 1" seems to work,

export ACTION="kill 1" #it will kill
export ACTION="kill 9" #did not kill
export ACTION="1" #did not kill anything
export ACTION="kill"  #did not kill anything
export ACTION="kill --signal 1" #did not kill anything                        
export ACTION="kill --signal SIGHUP" #did not try it because  kill --signal seems not to work
export ACTION="kill --signal SIGTERM" #did not try it because  kill --signal seems not to work
export ACTION="kill --signal 15" #did not try it because  kill --signal seems not to work