Issue with Traktor pro 4 with 2 XDJ 700 pioneer and DJM A9

Hello,

I was using Traktor pro 4 with 2 XDJ's 700 on HID mode and a DJM A9 mixer pluged in (all of them) with USBs on my Laptop (ASUS Vivobook 15 M513U cpu: AMD R5 5500U ssd: 512G PCIEG3 ram: DDR4 8G). As i was playing a stem file on Deck B the waveform suddenly went blank on XDJ 700 and when the playback needle got to that blank point there was no sound. Im using Flac Files and i know that XDJ 700 doesnt support that type of file but for 1 hour everything worked normally. This happened out of nowhere so i closed Traktro PRO 4 and i saw that the desktop image on my laptop was deleted and been replaced by a black background image. Really weird. Does anyone have an idea what happened or if its anything i can do?