You seem to keep finding issues that I didn't know exist. Keep up the good work, and let us know if Support can sort it out

Good work. I also have zigbee2mqtt so plenty of traffic. BI5 just works with MQTT here though.

Does "Reliability History" show anything odd ?

Long live the Unicorn

Quick, one has escaped

Are all cameras hard wired ? Or some wifi ?

That should do the same as turning the default model off, but hey don't knock it if it works

Zerotier opens up a few other programs from your LAN to your mobile device, as they now all appear to be on a local LAN.

How can you be sure your MQTT broker isn't stopping ? Mine doesn't seem to miss a beat here, and I'm running Eclipse Mosquitto on my home automation pc.

OP: Just to be clear, HeneryH is asking if UI3 in a browser on your mobile device can view your BI5 server using the WAN, not the BI app.

If you already answered that, then the next place to look is the router or even firewall rules.

You should be able to do that with profiles and schedules. Sunset and sunrise can also be automated by BI5.