Moving Event Hubs Cluster and Event Hubs Namespace in to different resource group

I want to move Event Hubs Cluster and Event Hubs Namespace to different resource group.

When I try to move Event Hubs cluster I get the following error

There was an error moving resources. Resources '/subscriptions/GUID/resourceGroups/target_rg/providers/Microsoft.EventHub/clusters/ResourceName' could not be moved. The tracking Id is '0884d78f-c0bb-45b3-9b92-65b4dda686c6' (Code: ResourceMoveFailed) undefined (Code: BadRequest, Target: Microsoft.EventHub/clusters)

When I try to move Event Hubs Namespace I get this error

There was an error moving resources. Resources '/subscriptions/GUID/resourceGroups/target_rg/providers/Microsoft.EventHub/namespaces/NamespaceName' could not be moved. The tracking Id is '0c4b8e3e-cb9d-4835-9f23-6ce13bb42b24' (Code: ResourceMoveFailed) undefined (Code: BadRequest, Target: Microsoft.EventHub/namespaces)

As per the below doc they both are movable

https://docs.microsoft.com/en-us/azure/azure-resource-manager/move-support-resources

what am I doing wrong?

Thanks