Have you only recently started experiencing this, or has it been going on for a while?

Are the other tracks visible in your screenshot still playable?

It’s possible that the tracks which aren’t visible have been removed from Deezer for various reasons. For instance, Deezer may no longer hold the rights to them, or the record label might have chosen to withdraw them.

All the songs was working and downloaded, i bought a new phone, and found them like this , even the highlighted songs cant download them as you can see in the picture