Hey guys, sometimes when you analysis MP4s in export mode (usually dumping in a few tracks at once to get them queuing) the overall preview track won't match the track itself and require a reanalyse.
https://www.dropbox.com/s/cbu64ch294f5d0m/Rekordbox%20Analysis%20Glitch.mov?dl=0
Ignore the fact I had another track highlighted in the browser, I was on the video version of the song the whole time and after anaylising it a second time you can see it fixes the preview wave form. This will also show incorrectly on a CDJ.