Cannot access my ASP.Net MVC service at all

I am new to Kubernetes, and would like to access my ASP.Net MVC web application service, but it just gets timed-out when I curl the external IP address generated by the Metallb load balancer from microk8s. However, when I describe the service created, the endpoint is generated correctly as shown below.

Name:                     sensory-service-loadbalancer
Namespace:                default
Labels:                   <none>
Annotations:              <none>
Selector:                 app=sensory-aromalab
Type:                     LoadBalancer
IP Family Policy:         SingleStack
IP Families:              IPv4
IP:                       10.152.183.141
IPs:                      10.152.183.141
LoadBalancer Ingress:     10.64.140.44
Port:                     <unset>  81/TCP
TargetPort:               8080/TCP
NodePort:                 <unset>  30243/TCP
Endpoints:                10.1.136.170:8080
Session Affinity:         None
External Traffic Policy:  Cluster
Events:
  Type    Reason        Age                  From             Message
  ----    ------        ----                 ----             -------
  Normal  nodeAssigned  84s (x215 over 17h)  metallb-speaker  announcing from node "tihg-nbg-test-1" with protocol "layer2"

The home HTML page is displayed when I type curl 10.1.136.170 (the endpoint address), but the connection gets refused when I try to curl the IP and LoadBalancer Ingress addresses.

This issue doesn’t happen to other applications whose frontend and backend services are deployed separately, which means I can curl them locally with no issue, but the timed-out problem or the connection being refused issue is happening to this ASP.Net Core application.

My yaml files for the deployment and service are as mentioned below. It would be great to hear any suggestions to this issue.

deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: sensory-deploy
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: sensory-aromalab
  template:
    metadata:
      labels:
        app: sensory-aromalab
    spec:
      containers:
      - name: aromalabweb
        image: ewptih/sensoryaroma
        imagePullPolicy: IfNotPresent
        ports:
          - containerPort: 8080

service.yaml

apiVersion: v1
kind: Service
metadata:
  name: sensory-service-loadbalancer
  namespace: default
spec:
  type: LoadBalancer
  selector:
    app: sensory-aromalab
  ports:
  - protocol: TCP
    port: 81
    targetPort: 8080

Hello eaindra-tih,
Microk8s team is advising on issues created on github for Microk8s, Do you mind to open a threat there?