Mopidy not triggering some event


I’m having an issue with events with Mopidy 2.1.0.
I noticed events like “trackPlaybackStarted” or “trackPlaybackStopped” don’t trigger except if I click the next button (not when a track ends and another one begins).
So far, all events triggered by user work well ; but those that need to be triggered automatically are not.

Any Thoughts?