- With the Vector skin, see the greyed out badges for Alerts and Notices and the counter having some numbers. That indicates that the notifications have been seen.
- Switch to Minerva skin - the bell icon without counter will briefly flash and disappear - see the screen recording.
The bell icon behavior should be consistent with the badges behavior - even if there are only seen notifications (or only read notifications) - the icon should communicate it users in every skin. Besides, even the icon without the counter will be a valuable link to Special:Notiifcations.
Note: Interestingly, Minerva skin displays notifications properly. In Minerva skin, see the notificaitons - the grey icon with the counter will be displayed. Re-load the page, the bell icon (without the counter) will be briefly displayed and disappear.