Number of listening of a song

hello,

i noticed a huge difference between the number of listening of the songs I play on my different devices and the result on my statistics on the Apple Music replay.

I'm playing my music on both MacBook air and iPhone, both are internet connected, but the songs are downloaded (via Apple Music to avoid data uses) I don't use air play.

And for a song dropped one month ago, Apple Music on my Mac indicates I play this song 600 times, when my last apple music replay update (last Sunday) indicated 23 play

How this can be explained?

Do Apple Music delete some listening on purpose?

Don't Apple Music count locals and downloaded song as real listening?

Im a really engaged person when it comes to stream for an artist, and this bothers me a lot.

thanks for your help