XDJ 1000 MK2 - Waveform not showing

Hi, I have a XDJ-XZ + 2 XDJ-1000MK2s all linked with Ethernet cables. When the USB stick is in one of the XDJ-1000MK2, the main waveform of few specific tracks doesn't show up (I only see the small waveform at the bottom, and it's blue, which shouldn't since I have everything configured at RGB).

If I load the same track on the XDJ-XZ, the problem persists. However, If I connect the same USB stick to the XDJ-XZ, I have no problem with these tracks (even if I load them on the 1000MK2s. 

All the tracks are analysed in Rekordbox. Can anyone help me with that?

Thanks :)