Rekordbox sync corrupts my Rekordbox USB sticks...

I have imported my Traktor collection to Cross, and then used the Rekordbox sync to get all my cue points into Rekordbox.
The problem is every time I use the Cross Bridge in Rekordbox, to import playlists, something happens to the exported tracks on my USB sticks. After using them in my CDJ-850s for 5-10 minutes, the browser on the deck locks up, the only way to fix is to eject or power off the deck, it soon happens again though.
I think there is a problem with the Rekordbox sync in Cross, although importing from iTunes also causes the same issues.
The problem is every time I use the Cross Bridge in Rekordbox, to import playlists, something happens to the exported tracks on my USB sticks. After using them in my CDJ-850s for 5-10 minutes, the browser on the deck locks up, the only way to fix is to eject or power off the deck, it soon happens again though.
I think there is a problem with the Rekordbox sync in Cross, although importing from iTunes also causes the same issues.