@pcayphas I’d recommend upgrading to the latest RC’s, or even the latest stable version as 1.4.0-RC-12 is fairly old and many new features and bugs have been corrected since then. If you’re using plugins, in particular, 1.4.4 has a known issue where installing a new plugin, or reinstalling one, wont create the database table for that plugin if one was needed. There is a way to patch this which can be found relatively easily.
As to the problem, I’m not sure what it is, or how much this Nic is causing issues when compared to the newer kernels. You could try updating your kernels to 4.13.4 and see if your Nic is working properly.