bug: Root Ingress path with `pathType: Prefix` does not work on some ingress controllers

[iguant]

Did you check docs and existing issues?

• I have read the n8n Helm chart documentation
• I have updated the Helm chart to the latest version before submitting this issue
• I have searched the existing issues of n8n
• I have searched the existing issues of related Kubernetes/Helm components

n8n version

1.112.0

Helm chart version

1.0.15

Kubernetes version

1.31.1

Helm version

3.19.0

Operating system/platform

Oracle cloud

Describe the bug

When deploying the n8n Helm chart, the generated Ingress uses:

- path: /
  pathType: Prefix
  backend:
    service:
      name: n8n
      port:
        number: 80

On some ingress controllers this configuration does not route requests to / correctly.
As a result, the n8n web UI is inaccessible at the root path.

Replacing the root rule with:

Replacing the root rule with:

- pathType: ImplementationSpecific
  backend:
    service:
      name: n8n
      port:
        number: 80

or moving the root service to defaultBackend resolves the issue.

Steps To Reproduce

1. Install the n8n Helm chart with the following values:

ingress:
  enabled: true
  hosts:
    - host: "host"
      paths: ["/"]

2. Try to open the n8n web UI at https://<host>/.
3. Observe that the UI is not accessible.

Expected Behavior

The root path (/) should route correctly across different ingress controllers, not only ingress-nginx.

Helm values.yaml

Kubernetes logs

Additional context

This affects environments where pathType: Prefix for / is not supported or behaves differently than in ingress-nginx.