Volvo XC40 sensus - heart doesn’t save in playlist

[TMi]

Premium

BelgiuM

Volvo Sensus

Hi, the Spotify app (downloadcenter) in my car (iPhone xr) works fine but when I have given a good song a heart (on car screen), I can’t find the song on my tablet or pc (home). It doesn’t save the song on all devices. How come?