>>I've deactivated all reporting and services that call back home (at least which I was aware of). In addition I've installed glasswire to check the network activities.
I'm going to recommend to you, or anyone, wanting to verify Windows 10 network behavior to do it without depending on software running on the OS itself. Try verifying it again using network analyzing software on linux or macosx, running downstream of your network setup. e.g., a router that's running linux you can ssh into and run "ngrep"(kinda like a commandline version of wiresahrk) and verify from there.
I'm going to recommend to you, or anyone, wanting to verify Windows 10 network behavior to do it without depending on software running on the OS itself. Try verifying it again using network analyzing software on linux or macosx, running downstream of your network setup. e.g., a router that's running linux you can ssh into and run "ngrep"(kinda like a commandline version of wiresahrk) and verify from there.