DJM-450 Channel Freeze

Hi Pioneer,

I'm a huge fan of your products but I'm experiencing a channel freeze every 20 minutes. The only way to solve it is by removing the USB cable and plugin it back.

The behavior is exactly like described by this youtube video:

https://www.youtube.com/watch?v=mEzHttVIQko

Is this a software issue? should I rollback the version of the firmware of my DJM-450?

This is making my device require a external audio card, and that doesn't make any sense!