Certain songs stop playing

[IzzySlashGNR]

Some of the songs I downloaded work perfectly well online, but pause at a certain point when played offline. (e.g stops playing after reaching 0:44)

[woodandrew90]

I have possibly the same problem :  of the tracks that I download for offline use, typically 2 or 3 out of 10 will only be partially downloaded (and thus stop playing partway through).  And is usually (but not always) the first few tracks of an album/pléaylist that are affected.  

At the weekend I downloaded 4 albums.  EVERY album has a number of tracks that won't play.

And this has been a problem since a couple of months ago (it is definitely a newish problem; I have been premium for 2-3 years and this has only been a problem recently).