iTunes track errors

Hello all,

 I'm new to the forum, so maybe someone already discussed this, but here goes.

I allways buy my tracks from iTUnes and never had a problem up to the last 6 months, where some of the most recent tracks started freezing when playing on my XDJ1000's.

I download the track, analyse through rekordbox and then when I go and play the track on the player at some point they go into emergency loop. 

Hearing them on the preview player on the pc, I notice they seem all to have a gap in sound, like the transfer didn't go well.

Some songs I just delete and re-download from iTUnes over and over and some songs I get them well analysed and trasnfered to the usb drives, but others just don't go well, most noticeable song is Mafiosa and Patrick Hernandez.Born to be alive !?!?!

Has anyone had this issue before? 

Thanks in advance