XDJ-RX2 audio off some second during the normal job

Good morning, i have xdj rx2 with latest FW 1.42 and two days ago, during the party, the music go away for 1-2 seconds from XLR master and then come back...i have no problem during this situation, the console work normally....the sound go away only from master xlr and not from BOTH monitor....sound on LED meter ALWAYS to 0 db, cable Proel new, system audio behringer eurolive B1800XP + B215D....do I need to worry? Has anyone had the same problem as me and maybe solved?

thanks