I had (probably still have) a similar-ish problem. I have an old nVidia Shield handheld that I bought a wired ethernet adapter for. Something about that adapt

I had (probably still have) a similar-ish problem. I have an old nVidia Shield handheld that I bought a wired ethernet adapter for. Something about that adapter would kill my network dead after a random interval. It took a while to figure out what device was causing it, and unplugging the adapter would instantly cause the network to come back to life. I never figured out what the root cause was, I just stopped using the adapter.