Every once in a while, a track will restart right when Automix has finished transitioning, creating an unexpected and jarring effect. I cannot reliably reproduce this, and it doesn’t seem associated with any particular song, but it definitely ruins the transition when it happens.
And just an FYI: when a track erroneously restarts like this, the playhead jumps to my custom start point, not at the beginning of the mp3 (if a start point was set).
Djay Pro 2.0.11 for Mac, OSX 10.14.4, using local mp3 files (no spotify used here) and Automix enabled.