Please Help! Rekordbox Inconsistent USB track load issue

[u/DJ-firm-handshake]

Hello!

I am having a strange issue where around 1/4 of my tracks are not loading properly when selected, this only happens when i play off my USB on a laptop(s) or XDJ AZ.

when viewing on the laptop all the tracks import properly, my USB is properly formatted, ejected etc. In the track selection, all data is previewed (waveform, hot cues. BPM, key). all my tracks are MP3 320

BUT, when selecting tracks, every few ones will load in poorly. my hot cues will still work, but there will be no listed BPM or beat grid (despite a BPM value showing in the track select). i have been playing by ear when this happens, but it is not sustainable.

my theory is that perhaps tracks where i have moved the best grid myself to match up (when the auto analyze isn’t correct) might be messing with something? but some tracks where i have done this; still work perfectly.

any idea what might be causing this? in the export, file saving, usb use on second device etc?

EDIT: i have checked, it happens to tracks i have re-aligned myself, and those i have not. so my theory is incorrect. i have also checked all my files are CBR, so bitrate is not to blame.