Opus Quad - USB tracks not showing up (Already on Device Library Plus)

I haven't had any trouble with this until today. I threw a few more songs on my USB stick in rekordbox, Synchronized, and when I plug the USB back into my Opus Quad it sees the USB stick in the source list, but when I select it and browse I see no tracks. When I search, they show up, but there is no browse list like normal.

How can I fix this?