Yup I know 
But this is on the advice of Support ...
Looks like I have a ZWAVE Device Driver that causes the ZWAVE to crash and die in HE.
Unfortunately I cannot do without the device, it controls the house heating boiler for radiators and hot water. If I can't control the device I have to use different HA hub.
Support say the only way to reset the zwave system is to shutdown and power off for 10 seconds then power back up.
The ZWAVE system has only died twice in 30 days, so if I can reboot it every night then I am hopeful it can be avoided until I can figure out a way to get a working driver..
