After about 5-10 minutes the HA install on VirtualBox (on OSX) seems to lose Network Connection. 
Calling on Lovelace from (1) Mobile App or (2) Browser (on machine or other LAN machine) will fail at first (NIC LINK IS DOWN) but seems to wake it up (NIC LINK IS UP comes back), such that a minute later HA/Lovelace is available again. No reboot, just the Network connection does not seem to stay alive.
Incredibly annoying
Followed the tutorial for settings on VirtualBox so all settings as per primer.
Was thinking of running a script locally which calls Lovelace every minute but that’s really not the way to solve this.