Zigbee2MQTT bridge loses connection every day at same time

As title really.

Ever since whatever upgrade added the zigbee bridge device into HA every day at around 11:05am (+/- 5 2 minutes) all my zigbee devices drop off the network.

Zigbee2Mqtt is still up and working, I can see messages flying back and forth. The ‘zigbee2mqtt’ bridge is unavailable. If I restart zigbee2Mqtt (the docker container) the zigbee2mqtt bridge becomes available, but no devices return until I press ‘restart’ on the bridge in HA.

So the sequence is:

At around 11:05 the bridge device and all zigbee devices become unavailable.

I restart zigbee2mqtt and the bridge device becomes available, but all zigbee devices still missing

I hit ‘restart’ on the bridge device and everything comes back.

Happens every day like clockwork around 11:05am. I can’t see anything in the logs of either HA or Z2m happening around then so I’m a little stumped.

And what about the MQTT logs?

Nope, nothing untoward