So, you can see my settings in the previous reply. And yes, the tabs are working as intended, when I open the "Mentions" tab = I don't see your reaction, which is correct.
However, I still received the notification about your reaction (a small purple dot). My question is, have you considered adding a feature so that, based on the settings (which you see above), notifications for reactions don't come through at all (because I disabled them), rather than just filtering them by tab as it currently does?