Green artifacts and GT King Restart

zeroxul

Hello,
If I have IPTV (Zattoo) and Geforce Now running at the same time, on different devices in the same network, sometimes I get green artifacts with geforce now and gt king restarts completely or only the launcher restarts.
Do not know if the error is due to geforce now or the GT King but i have the error only with the GT King, on other devices (mobile phone, tablet, pc) the error does not appear.
Have the feeling the green artifacts appear at high network utilization.
does anyone have the same experience, or knows what it is?
https://imgur.com/a/wsFyTfu