FFMPEG and Wi-Fi Internet connection drop

Question

I've encountered a strange issue: my Wi-Fi internet connection drop off while converting files with -vcodec h264_nvenc inside powershell.

As soon as the conversion is ended Wi-Fi start working again.

Since I receive a DNS PROBE error on every browser I've decided to change DNSs but I still have this issue

I'm using something like this: ffmpeg -ss 00:01:20 -to 00:08:00 -i input.mov -c copy -vcodec h264_nvenc -vf scale=2560:1440 -b:v 99000k output.mov

I suspect it is some conflict with my GPU but it seems very strange becaus it's only happening with this specific command in FFMPEG.

I'm actually using the Zeranoe build.

my build is Intel i9-9900K Z390 Aorus Pro nvidia RTX 2080 Msi gaming trio

All drivers are up to date

thanks