basePath can not work

[leveryd]

Chart version:

8.5.1

Kubernetes version:

v1.21.5

Kubernetes provider: E.g. GKE (Google Kubernetes Engine)

self-host

Helm Version:

v3.8.0

Describe the bug:

Steps to reproduce:

1. in values.yaml, i configure kibana as below

kibana:
  elasticsearchHosts: "https://elasticsearch-master:9200"
  kibanaConfig:
     kibana.yml: |
      server.basePath="/kibana"
      server.name="dev.com"
      server.host="0"

2. configure ingress

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: kibana
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /$2
spec:
  rules:
    - host: dev.com
      http:
        paths:
          - path: /kibana(/|$)(.*) # match all paths that begin with /kibana/
            pathType: ImplementationSpecific
            backend:
              service:
                name: release-name-kibana   # name of the service
                port:
                  number: 5601

Expected behavior:

I can normally access kibana ui on http://dev.com:{ingress-port}/kibana.

But acctually, when i visit 'http://dev.com:{ingress-port}/kibana', i will be redirected to 'http://dev.com:{ingress-port}/login' and then response status code will be 404.