One of the C7 hubs crashed this morning @ 5:47:13:858 and I noticed it at about 10:45
Hard rebooted the HE and all came back online but with warnings that the zigbee network was down.
I checked and zigbee devices are working ok.
I am not concerned by this, this is the first time I have experienced a total HE crash in 16 months of usage.
The logs come to a complete halt at 05:47 so assuming that is when it crashed.
About to move to a new house and will completely rebuild HE back into a Home Automation hybrid with Node Red providing hub oversight/management.
So as long as the system is good for the next 6 weeks All will be good.