Yes, this is a known issue. USB 3.0 modulates in the same 2.4 GHz frequency band as your WiFi and thus can interfere with it. I avoid this by using the 5.0 GHz AC band...
[Edit: I will add: known issue not just for NUCs]
This message was posted on behalf of Intel Corporation
Just to narrow down your issue, double check if you have the latest BIOS version 0037 and latest drivers (Chipset, Management Engine and Wireless).
BIOS version 0037