I am attempting to create a post in a forum-type channel, in which a role is being mentioned in the `content` field. Although the syntax is correct (it works in normal channels), the members of the role do not receive notifications (there is only 1 member of the role - me - so it does not hit the 100-user limit that I have seen documented elsewhere). I found that this is because the members of the role are not following the post at the time it is made. Subsequent role mentions through the webhook after an explicit follow by the user result in a notification.
To keep behaviour consistent with channels, I would request that notifications for role mentions be enabled, even if the user has not followed the post.