I discovered this section(Play Hours) recently and was quite surprised that my usage was very low. But after following this section during December and January, i am starting to doubt if this data is reliable.

For ex, during whole of January, the section says i played Sonos for 7 hours. But in reality it should be much more than it. I know it because i had many holidays and my usage should have been more than 12 hours. 

I use my Sonos One to listen to music via spotify. Does the feature not count the hours if i directly play Sonos from Spotify app rather than Sonos App? 

Also, i listened to 1-2 hours of audible. Neither was this data captured at all.