Identity provider is read only, but on the UI the success pop-up is shown.

Hi. I have been implementing the custom read only identity provider. I am getting all user groups from the Azure. I see that it is not possible to update groups and so on, but If I am trying to remove user groups the Admin-Users->Groups api service returns response belov, which is considered correct behaviour.

{
    "type": "InvalidRequestException",
    "message": "Identity service implementation is read-only."
}

However, on the camunda Admin UI, the success pop-up is shown, like “Success: User removed from group”, but nothing happens.
Thank you!