Notification to Assignment Type: Reader

I am trying to send an email notification when item is moved from Draft to Review state.
Assigned Role for Review state is Approver and its Assignment Type is Reader.

The strange thing is that notification only works for Approver if I change its Assignment Type to Assignee. While it is set as Reader, the email does not go through.

State Role Recipients Type on Transition Notification is set to ‘To State Role Recipients only’.

Is this the correct behaviour, where Reader in not notified, or am I missing something?

Thanks,
Igor

The behavior is correct. Readers are not notified because they can’t do anything with the item in question, only assignees can.