When someone makes a comment or post that has my username tagged in it, it'll show in the "Mentions" tab if I manually go to it, but will not fire a notification or even show a red dot unread counter on the tab.

Moreover, if it was a comment that would have ended up in my main inbox anyways (E.g. as a direct reply to my post or to a comment of mine) it won't show in the main inbox at all

I assume it might be intentional to not show messages in the main inbox if it's showing in the mention tab, but without the Mention tab firing notifications that's rather...problematic lol