Mine are clearing properly, including the notification numbers. Are you clearing your by checking them and hitting the Delete Checked button, or, are you clearing them by hitting the Nuke button? I always clear mine by clicking on Delete Checked, and that has always worked for me. I also use the classic interface, rather than modern, so maybe it only breaks in modern?

It might be a good idea to do a trouble ticket to report the problem , and let them know how you are clearing your notifications. They might not be aware that there is a problem, if no one has reported it yet.

Yeah, thanks. I remember doing something by clicking on "Clear Selected" to ratify the problem, so again thanks for jogging my memory. The problem doesn't happen all that often though.