@YouTube isn't working at all for me. No nofifications, messages disappear in streams, streams are glitchy as hell too. Also every link puts me into the front page...
Hmm, does this happen across devices? On mobile, try restarting the app and making sure it's updated. It can also help if you uninstall & reinstall the app. On a computer, try clearing your browser's cache & cookies: https://yt.be/help/Cko1 Let us know how it goes!