What is the purpose of this clone?  The issue was fixed in 4.10.0, and this BZ also targets 4.10.0.  Did you mean to request a backport and forget to set the target release?

This is a backport and now right target release is set.

Clearing the needinfo flags as justification is provided by Pablo

% oc new-project service-route-issue
Now using project "service-route-issue" on server "https://api.ci-ln-5c25ykk-76ef8.origin-ci-int-aws.dev.rhcloud.com:6443".

You can add applications to this project with the 'new-app' command. For example, try:

    oc new-app rails-postgresql-example

to build a new example application in Ruby. Or use kubectl to deploy a simple Kubernetes application:

    kubectl create deployment hello-node --image=k8s.gcr.io/serve_hostname

 % oc create -f https://raw.githubusercontent.com/openshift/origin/master/examples/hello-openshift/hello-pod.json
pod/hello-openshift created
 % oc label pod hello-openshift app=hello-openshift
pod/hello-openshift labeled
% oc get po 
NAME              READY   STATUS    RESTARTS   AGE
hello-openshift   1/1     Running   0          10s
 %  oc create service clusterip hello-openshift --tcp=80:8080 --tcp=443:8443
service/hello-openshift created
% vi route.yaml
% cat route.yaml
apiVersion: route.openshift.io/v1
kind: Route
metadata:
  creationTimestamp: null
  labels:
    app: hello-openshift
  name: hello-openshift
spec:
  host: ""
  port:
    targetPort: 8080
  tls:
    termination: edge
  to:
    kind: ""
    name: hello-openshift
    weight: null%                                                                                                                                                                                         %
% oc get svc

NAME              TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)          AGE
hello-openshift   ClusterIP   172.30.158.58   <none>        80/TCP,443/TCP   72s
oc create -f route.yaml
route.route.openshift.io/hello-openshift created
% oc get route
NAME              HOST/PORT                                                                                        PATH   SERVICES          PORT   TERMINATION   WILDCARD
hello-openshift   hello-openshift-service-route-issue.apps.ci-ln-5c25ykk-76ef8.origin-ci-int-aws.dev.rhcloud.com          hello-openshift   8080   edge          None
% cat route-with-insecure-allow.yaml 
% vi route-with-insecure-allow.yaml 
% cat route-with-insecure-allow.yaml 
apiVersion: route.openshift.io/v1
kind: Route
metadata:
  creationTimestamp: null
  labels:
    app: hello-openshift
  name: hello-openshift-http-allow
spec:
  host: "hello-openshift-service-route-issue.apps.ci-ln-5c25ykk-76ef8.origin-ci-int-aws.dev.rhcloud.com"
  port:
    targetPort: 8080
  path: "/test"
  to:
    kind: Service
    name: hello-openshift
    weight: null
  status:
    ingress: null
% oc create -f route-with-insecure-allow.yaml 
route.route.openshift.io/hello-openshift-http-allow created
%  oc get routes
NAME                         HOST/PORT                                                                                        PATH    SERVICES          PORT   TERMINATION   WILDCARD
hello-openshift              hello-openshift-service-route-issue.apps.ci-ln-5c25ykk-76ef8.origin-ci-int-aws.dev.rhcloud.com           hello-openshift   8080   edge          None
hello-openshift-http-allow   hello-openshift-service-route-issue.apps.ci-ln-5c25ykk-76ef8.origin-ci-int-aws.dev.rhcloud.com   /test   hello-openshift   8080                 None
% 
% curl -Ik http://hello-openshift-service-route-issue.apps.ci-ln-5c25ykk-76ef8.origin-ci-int-aws.dev.rhcloud.com
HTTP/1.0 503 Service Unavailable
pragma: no-cache
cache-control: private, max-age=0, no-cache, no-store
content-type: text/html

% curl -Ik http://hello-openshift-service-route-issue.apps.ci-ln-5c25ykk-76ef8.origin-ci-int-aws.dev.rhcloud.com/test
HTTP/1.1 200 OK
date: Tue, 11 Jan 2022 09:21:06 GMT
content-length: 17
content-type: text/plain; charset=utf-8
set-cookie: adbec88c545fa91f71ca5c51323dccf8=6f724422fa0872ec59434efcf87f7808; path=/; HttpOnly
cache-control: private

% curl -Ik https://hello-openshift-service-route-issue.apps.ci-ln-5c25ykk-76ef8.origin-ci-int-aws.dev.rhcloud.com    
HTTP/1.1 200 OK
date: Tue, 11 Jan 2022 09:21:19 GMT
content-length: 17
content-type: text/plain; charset=utf-8
set-cookie: 29df4ae9f33eb1d50113228c1151c2c9=6f724422fa0872ec59434efcf87f7808; path=/; HttpOnly; Secure; SameSite=None
cache-control: private

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (OpenShift Container Platform 4.9.41 bug fix update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:5434