Remote site, Ignition Edge with the MQTT Transmission module publishing about 900 tags to the cloud broker over a 4G link. Every time the link drops, and it does a few times a week, there's a ten minute hole in the cloud historian, sometimes fifteen. The Edge box itself stays up the whole time.

I tried QoS at 1 and then 2, no difference, and took the keepalive down to 30 s so it reconnects faster. It does reconnect faster. The hole is still exactly as long as the outage.

Carrier says put a second link in, IT says put a second link in. I'd rather understand why the data doesn't catch up first. Any ideas?