Fair enough. So I checked my "Groups & Network" and there I see:WARNING : As with any Z-Wave®
"binary switch" device, the
SwiidInter™ is not able - for patent reasons - to report back
its status changes automatically to a Z-Wave®
controller.
The best way to monitor the change in status of your
SwiidInter™ in real-time is to associate via the second
association group (see Chapter on "Switch Association")
with your primary controller. This works both when the
change in status of your SwiidInter™ is the result of a
manual action and when it is linked to a command
communicated through the Z-Wave® network. FOR CERTAIN
Z-WAVE® CONTROLLERS, THIS ASSOCIATION IS PRE-PROGRAMED
TO BE IMPLEMENTED ON ITS OWN WHEN YOUR SWIID® CORD
SWITCH IS FIRST INCLUDED INTO THE NETWORK.

so that looks correct (the controller is 1). But if I press the switch the status is not reported into Domoticz (I'm using Aeotec ZW090 Z-Stick Gen5 EU as a controller) and I still see the old state.
If I enable polling of course that solves it. But I'm wondering why isn't the real-time notification working? Any ideas?