Hi, I have a PC running Ubuntu 16.04 and I remote into it from my 2016 TB MBP with Mac OS Sierra 10.12.1 Sometimes I can't log in to it, not by using its hostname nor the IP address. I can't browse the Plex Media Server which is hosted by the same PC either. At the same time I can still browse the Internet with no issues at all. And I can still access my NAS by both IP address and hostname. The connection to the Ubuntu host works if I turn Airport off and then I turn it back on. BTW I also experienced a similar behaviour with my old 2010 MBP running El Capitan. Has anyone had a similar issue before? If so - is there a fix? Thanks.