rekordbox - crackcle

Gentlemen, macbook m2, 16 GB RAM, 1 tb disk, rekordbox 7.0.8, ddj - 1000. After a few hours of playing, the second channel starts crackling, the rest works fine. After switching to 4 channels to play cleanly, after some time the 2nd channel returns to normal.
Where to look for the cause?
Changing the USB cable does nothing, turning off the wifi too, unplugging the charger also nothing. Probably not the electricity either, because it happened in different places.

Ddj on an older 2013 mac and rb 6 did not do such things