In the docs for Heroku- App Sleeping on Heroku- it says that apps with a filled in hexagon icon will never go to sleep.
Mine has that icon, but still goes to sleep:
-from App Sleeping on Heroku
Unlike the outlined hexagon with zzz's pictured above, when my app goes to sleep, the icon becomes a filled in hexagon icon with zzz's.
Why is my app going to sleep if the icon is indicating it won't? It this just old documentation on Heroku?