This topic is the most close I find about notifications and bug, so I put it there. In this flarum community forum, I just had a weird notification:

Which leads to this message, from January, so posted way before my own message (which is from 3h ago).
Don't know if it's the first time this bug is reported?
@Justoverclock, maybe you know what could have triggered this?
EDIT: i see you answered me in this other topic, but I have no notification for this one.