Comment 7 for bug 1916817

I've just tried with Debian, sourced from the Microsoft Store. That doesn't suffer this issue - all commands hitting the network (apt, curl etc) work as expected with and without sudo. I checked to be sure resolv.conf in Debian is pointing to the WSL virtual adapter, and it is.

I don't know what might be specific to my environment, given that you can't reproduce at your end. It's a fairly unmolested Windows 10 installation. I'll be happy to provide more info if there's anything that would be helpful.