Kore and Yatse won't connect to Kodi



Using Debian testing on a fresh install (Kore used to connect before, but oddly now won’t)

Settings are as follows:
inet 192.168.1.8  netmask 255.255.255.0  broadcast 192.168.1.255
(phone also has same subnet)

Zeroconf = Enabled

Allow remote control via HTTP = Enabled
Port = 8080
Username = kodi
Enable SSL = Disabled

Allow remote control from application on this system = enabled
Allow remote control from applications on other systems = enabled

Didn’t work without ufw installed, didn’t work with it installed – no difference. I wrote an allow rule for traffic between phone and kodi. No difference.

Very occasionally, I can part-load the webinterface from the Kodi machine, but nothing works and I can’t click anything, and usually it doesn’t connect at all.

What am I missing!?