Anecdotally, and I haven't done any serious testing of this, my work colleagues and I have noticed that on our 2017, 15 inch MacbookPros, wired Ethernet (either from a dongle, or a hub) is only reliable on the right hand side. One co-worker has realized he has to plug in his hub after boot, but before he logs in in order for the device to be recognized, if the hub is wired into his wall drop. There are obvious work-arounds to all these issues, but it's frustrating to have these sorts of problems on such an expensive machine.