My Joi lasted only a couple of hours more after I posted the reply here.

Everything is not responding again. I restarted Gateway , it works a few minutes and then Not Responding again.

To clarify here that Yesterday I added some more HomeKit modules, one of them a Netatmo one ( Not Legrand ) and everything is working as excepted. One small detail is that this Netatmo accessory caused name conflict with HomeKit, however it was working perfect. Fix the name and still is working without problem.

So I am not sure what is happening now…

Andreas