User blog comment:Kirkburn/Technical Update: March 3, 2015/@comment-1764483-20150306195816/@comment-452-20150306201459

The technical reason is because that when your mouse goes over the popup menu, it "leaves" the notification bar.

I agree that it is annoying and that they should change it.

I assume you're right-clicking because you want to open each link in a new tab, if this is correct: try ctrl-click.