Double slash in path

Questions
1

I have a Kong Ingress controller installed via Helm with the following parameters:

helm install kong kong/ingress \
   --version 0.20.0 \
   --create-namespace \
   --namespace kong \
   --set admin.enabled=true \
   --set admin.http.enabled=true \
   --set deployment.hostNetwork=true \
   --set controller.ingressController.env.feature_gates="FillIDs=true,RewriteURIs=true"

I have the following Ingress manifest.

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: documentserver
  namespace: "onlyoffice"
  annotations:
    konghq.com/strip-path: "true"
spec:
  ingressClassName: kong
  rules:
  - host: docs.example.com
    http:
      paths:
      - path: /docs/
        pathType: Prefix
        backend:
          service:
            name: documentserver
            port:
              number: 8888

It works fine when I visit docs.example.com/docs, and it returns docs.example.com/docs/welcome/. However, when I visit docs.example.com/docs/, it becomes docs.example.com/docs//welcome/.
When I add these annotations:

konghq.com/headers.X-Forwarded-Prefix: "/docs"
konghq.com/rewrite: "/"

I get this response:

Error no Route matched with those values.

How to get rid of the double slash in the URL?