Ambassador Rate limitting not working properly - kubernetes

Question

I am trying to do rate-limiting with ambassador following this tutorial. I am using minikube and local docker image.I have tested all api is responding correctly after deploying to Kubernetes only the rate-limiting function isn't working.
Here is my deploy.yaml
---
apiVersion: v1
kind: Service
metadata:
name: nodejs-deployment
spec:
ports:
- name: http
port: 80
targetPort: 3000
- name: https
port: 443
targetPort: 3000
selector:
app: nodejs-deployment
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: nodejs-deployment
spec:
selector:
matchLabels:
app: nodejs-deployment
replicas: 2
template:
metadata:
labels:
app: nodejs-deployment
spec:
containers:
- name: nodongo
image: soham/nodejs-starter
imagePullPolicy: "Never"
ports:
- containerPort: 3000
Here is my rate-limit.yaml
---
apiVersion: getambassador.io/v2
kind: Mapping
metadata:
name: nodejs-backend
spec:
prefix: /delete/
service: nodejs-deployment
labels:
ambassador:
- request_label_group:
- delete
---
apiVersion: getambassador.io/v2
kind: RateLimit
metadata:
name: backend-rate-limit
spec:
domain: ambassador
limits:
- pattern: [{generic_key: delete}]
rate: 1
unit: minute
injectResponseHeaders:
- name: "x-test-1"
value: "my-rl-test"
When I am executing the command -- curl -vLk 10.107.60.125/delete/
It is returning
* Trying 10.107.60.125:80...
* TCP_NODELAY set
* Connected to 10.107.60.125 (10.107.60.125) port 80 (#0)
> GET /delete/ HTTP/1.1
> Host: 10.107.60.125
> User-Agent: curl/7.68.0
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< X-Powered-By: Express
< Content-Type: text/html; charset=utf-8
< Content-Length: 11
< ETag: W/"b-CgqQ9sWpkiO3HKmStsUvuC/rZLU"
< Date: Tue, 03 Nov 2020 17:13:00 GMT
< Connection: keep-alive
<
* Connection #0 to host 10.107.60.125 left intact
Delete User
The response I am getting is 200 however I am expecting 429 error code.