PDBs created by operator don't seem fonctional

[SebPlv]

Hi,

Here's what I see in the PDBs created for the kafka controllers and brokers by the operator :

Name:           servicemsg-kafka
Namespace:      servicemsg
Min available:  8
Selector:       strimzi.io/cluster=servicemsg,strimzi.io/kind=Kafka,strimzi.io/name=servicemsg-kafka
Status:
    Allowed disruptions:  1
    Current:              9
    Desired:              8
    Total:                9
Events:
  Type     Reason                           Age                 From               Message
  ----     ------                           ----                ----               -------
  Warning  CalculateExpectedPodCountFailed  34m (x23 over 46m)  controllermanager  Failed to calculate the number of expected pods: strimzipodsets.core.strimzi.io does not implement the scale subresource

And we always have issues during node drain, the strimzi pods are not deleted because of this error.

I haven't found anything about this message in the documentation nor among the issues, so I guess we are missing something... Any help would be appreciated !