A new DVR prerelease is available with a major rewrite of the Bonjour server to improve reliability, affecting all non-macOS platforms. (On macOS we use the system Bonjour built in to the operating system).
The big change is improved handling of multiple network interfaces, and automatic IP change detection. Previously if your IP changed due to dhcp, you would have to go in and uncheck/recheck the Bonjour checkbox. Some users with multiple network interfaces (like from VPN clients or VM software) also had issues, and switching from one interface to another (like from Wi-Fi to wired) would not work automagically.
All these issues are now fixed. I’ve tested on Linux, Windows, Shield and FreeBSD but could use some more testing before pushing this out to everyone. If you would like to help, you can update to the pre-release by holding down the SHIFT key and clicking Check For Updates on the DVR web UI.
Please report any issues here.