Based on the feed back from many different YouTubers now @TeamYouTube!
YouTube is infact broken. Notifications are not working. And people are getting recommended videos that are two months to two years old.
Youtubers are experiencing a 20% to 30% loss in views.
I have a question, is it possible that it is due to the amount of notifications you turn on that youtube can't send you notifications because your getting too many at once that the app can't process all of them?