I think that is normal - I don’t think you ever get a notification for a comment left inside an ID, do you? I think you only get a comment notification for a comment which is a stand-alone comment, not part of an ID.
Did you load the observation page with the comment at some point? You won’t receive notifications if you enter an observation page before checking notifications and I don’t see the actual ID (which probably was given separately in combination with the standalone comment) which in turn wouldn’t let the comment notification or the identification notification show in your notifications.