SSR302 - Abnormal operation

I’ve had this boiler control unit in my setup for a number of years now and it’s been reliable until recently.

It’s dropping out of the Z-Wave network and reporting as being OFFLINE, then after a seemingly random amount of time it then comes back ONLINE. This cycle happens throughout the day and causes the Heating to be sporadic, not what you want as we enter the Winter months.

Are there any other users here that have had similar experience?

I have both power cycled the unit and rebooted the server running openhab. I’m not convinced that it’s a Z-Wave network issues as all my other devices are working as they should.

But always open to suggestions.