Commit
3b9d11d
Not a quirk, it's the normal moderation flow. Every commit and reply goes through automated moderation and can be pending, approved or rejected. Pending content isn't publicly visible, but you can still see its status on your own post. An admin or moderator approves or rejects it from the moderation queue, and approval is what triggers reply, quote and mention notifications.
commit 3b9d11d