RMX-Ignite Sound Issues (crackle noise)

Guys my RMX-Ignite does make some weird noises from time to time.

I have all latest versions. RMX is connected with USB to my A9.

The crackle noise occurs every few minutes randomly.

You can hear it at 17sec.

The Issue also occurs if no samples are triggerred and no effects are activated. Also if just stock samples are loaded.

I uploaded here a quick video so that you can hear the issue:

https://www.reddit.com/r/PioneerDJ/comments/1qz6c3a/rmxignite_sound_issues_crackle_noise/?sort=new

Any Ideas what that could be? Is it broken?