HPA failed status - unknow FlinkApplication / not found

I've created FlinkApplication cluster. After I've create a HPA with scaleTargetRef.. but hpa describe never find the new object FlinkApplication cluster "flinkoperator":

Cluster Green ok:

NAME                       PHASE     CLUSTER HEALTH   JOB HEALTH   JOB RESTARTS   AGE
flinkoperator   Running   Green            Green                       34m

Conditions:
  Type         Status  Reason          Message
  ----         ------  ------          -------
  AbleToScale  False   FailedGetScale  the HPA controller was unable to get the target's current scale: flinkapplications.flink.k8s.io "flinkoperator" not found
Events:
  Type     Reason          Age   From                       Message
  ----     ------          ----  ----                       -------
  Warning  FailedGetScale  8s    horizontal-pod-autoscaler  flinkapplications.flink.k8s.io "flinkoperator" not found

NAME                           REFERENCE                                   TARGETS                            MINPODS   MAXPODS   REPLICAS   AGE
flinkoperator-hpa   FlinkApplication/flinkoperator   <unknown>/14100Mi, <unknown>/95%   9         12        0          11m

Flink version: 1.9.2
AKS version:

% kubectl version             
Client Version: version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.4", GitCommit:"b695d79d4f967c403a96986f1750a35eb75e75f1", GitTreeState:"clean", BuildDate:"2021-11-17T15:48:33Z", GoVersion:"go1.16.10", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.1", GitCommit:"10428892c761e8ca8908e71146eea4751feb545b", GitTreeState:"clean", BuildDate:"2021-11-15T08:35:11Z", GoVersion:"go1.16.4", Compiler:"gc", Platform:"linux/amd64"}

Start by reproducing the HPA failure with the reported FlinkApplication and Kubernetes versions, using the HPA description and object status as the initial evidence. Trace how the operator exposes the FlinkApplication as an HPA scale target; done means the HPA finds the target and reports current replicas and metrics instead of “not found”.