Problem with laptop or rekordbox? Waveforms on some songs don't show on CDJs

For some reason, 1 out of every 15-20 songs that I load onto my USB seem to not load properly on CDJs. I've added a picture below. I can still press play on the song, and as it plays the small waveform on the bottom gets filled out. But the main one never shows up.

I've tried different USBs as well as different CDJs but the result is the same no matter what. Is there anything I can do? This has happened with songs I've purchased, downloaded on Soundcloud, been sent from friends, etc. MP3s, FLACS, etc. What's weird is if I transfer these songs via Dropbox to another friend and they load it on their USB it works perfectly.

Since the last time I posted about this issue (which wasn't resolved) - I've reformatted a USB I used and encountered the error on and used my friend's laptop/rekordbox to load some songs into it and it doesn't happen. So I am thinking it is either an error with my computer or my rekordbox configuration. Please help! Thanks in advance if anyone can figure this out!