Spotify offline listening counting towards listening history and stats.fm?

How can I make sure that the music I listen to offline on my Garmin 165 Forerunner Music is counted towards my Spotify and Stats.fm history?

I want my offline listening to be reflected accurately in both Spotify's listening history and my Stats.fm (formerly known as Spotistats) account. Has anyone managed to get their offline plays on a Garmin watch to sync properly? Are there any specific settings or steps I need to follow?

Additional Info:

Garmin Forerunner 165 Music

Spotify: Premium user

Stats.fm connected to Spotify