After removed the replicas, it is empty in the ingresscontroller, while it isn't unchanged when oc get hpa. And the TARGETS is "1050m/1 (avg)"

4.12.0-0.nightly-2022-08-31-101631

follow the steps as "OCP-53957 - Negative test of ingress autoscaling" describes.

1.just as "OCP-53952" describes, install the Custom Metrics Autoscaler by the web console.
2. scale the worker nodes to 20
% oc get hpa                      
NAME                      REFERENCE                   TARGETS         MINPODS   MAXPODS   REPLICAS   AGE
keda-hpa-ingress-scaler   IngressController/default   1050m/1 (avg)   1         20        20         8h
% 

%  oc get ingresscontroller/default -o yaml | grep replicas:  
  replicas: 20
%

3. edit the default ingress-controller, delete the "relicas:" line under the spec
% oc edit ingresscontroller/default                                            
ingresscontroller.operator.openshift.io/default edited
%

4.
%  oc get ingresscontroller/default -o yaml | grep replicas:  
% 

5. 
% oc get hpa
NAME                      REFERENCE                   TARGETS         MINPODS   MAXPODS   REPLICAS   AGE
keda-hpa-ingress-scaler   IngressController/default   1050m/1 (avg)   1         20        20         8h
%

6. there are 2 router pods
% oc -n openshift-ingress get pods
NAME                              READY   STATUS    RESTARTS   AGE
router-default-58b9754d4d-g6666   1/1     Running   0          123m
router-default-58b9754d4d-kvjm7   1/1     Running   0          123m
%

relicas in hpa keda-hpa-ingress-scaler is different with that in the default ingresscontroller

relicas should be same between hpa keda-hpa-ingress-scaler and the default ingresscontroller, also not sure about the TARGETS "1050m/1 (avg)" in the output of oc get hpa