I ended up resolving this issue. This was a couple years ago, but I think it resolved with upgrading to 4.22. If that doesn’t fix it, I remember there also being an issue with me using the google play services. That caused an override in the network manager which was supposed to be LAN but now was defaulting to google play. Disabling google play and making sure it was set to LAN restored the functionality for me. Hope this helps!