Just a bug report, no need to respond.
I updated my core and remote (core is RoonServer on Xubuntu 18.04, remote is Windows build running on Wine on Ubuntu 16.04, both plugged via Ethernet into the same unmanaged switch) to the latest build yesterday. Both worked fine together. I then updated my core machine, and rebooted it. The remote on Wine could no longer see the Core, or find it when I tried to connect to a new core. I had to stop that remote, and restart it, after which it found the core again. No problems with iOS or Android remotes. I realize this is an unsupported remote configuration.