rekordbox audio dropout

Hi guys,

I have a DJM 250mk2 with 2x reloop rp7000/shure m44-7 and ddj sp1.

PC - win10 / 8gb ram / i7 2.0ghz

I get a audio dropout and after this i need to reboot the software. I trying change buffer size but is does not work. It is enough that the signal is transmitted from only one turntable and software stop working. i can play 5 or 50 songs from freeze to freeze.

All drivers and software are up to date. This is a fault of the software, or is it possible that ddj sp1 negatively affects the work of the mixer?