All,
Thanks for the help. The manufacturer identified that there was a problem with a batch of units having an incorrect manufacturer ID. The provided an OTA update for the units and they are now working as expected. Thanks to everyone for your help.
As an aside, I think it is worth pointing out that Vesternet (https://www.vesternet.com/) from whom the switches were purchased were completely useless. They are the ones that supposedly offer “Lifetime Tech support” and demanded that a Z-Wave devices manufacturer ID doesn’t need to be valid and that platforms such as Openhab should be able to seamlessly handle devices that have incorrect or invalid manufacturer ID’s!
I guess its very easy to offer to provide free “Lifetime Technical Support” if the answer to any support inquiry is ‘its your problem, its nothing to do with what we sold you…’. Poor show Vesternet. For sure, a website / supplier to avoid in the future.
In contrast, well done TKB for quickly accepting the problem and providing a solution. No hassle, no fuss.
Regards
MFK