DDJ RB or Rekordbox issue.

Hi all. Recently I bought a DDJ RB and started working on Rekordbox. 4 days ago while I was playing at a bar the A & E pads on both decks turned on and the sound changed from music to a kinda high pitched noise sound. Needed to restart rekordbox and unplug & plug again the console to fix it. Anyone knows what may caused it or if I can find logs anywhere to see a crash report or if its a midi controller issue?