yaml feature not support

[pythonwood]

Files that can reproduce the issue

version: 4.4.1

 resources:                                                                                                              
   - a.yaml

# a.yaml
---
kind: Ingress
apiVersion: networking.k8s.io/v1
metadata:
  name: a-ingress
spec:
  tls:
  - hosts:
      - "*.abc.com"
      - abc.com
    secretName: abc.com
  rules:
  - host: api1.abc.com
    http: &http
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: svc202111
            port:
              number: 2021
  # kustomize build . not support below , annote it with work
  - host: api2.abc.com
    http:
      <<: *http

however, kubectl apply -f a.yaml just ok

Expected output

Actual output

error: map[string]interface {}{"apiVersion":"networking.k8s.io/v1", "kind":"Ingress", "metadata":map[string]interface {}{"name":"..... json: unsupported type: map[interface {}]interface {}

Kustomize version

version: 4.4.1

Platform

Additional context

[k8s-ci-robot]

@pythonwood: This issue is currently awaiting triage.

SIG CLI takes a lead on issue triage for this repo, but any Kubernetes member can accept issues by applying the triage/accepted label.

The triage/accepted label can be added by org members by writing /triage accepted in a comment.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[KnVerey]

Duplicate of #4215 , closed by #4383