There is another difference between releases until 2.15.3 and the following ones.
Example - IKEA bulbs (I don’t know if it’s the same with other brands; I have only them connected to wall switches)
I switch ON a bulb. Then I switch it OFF (no more 230V in the bulb).
Behaviours:
Until 2.15.3 deconz understands after some minutes (sometimes between 5 and 10) and puts the bulb as unaivalable.
From 2.16.0 deconz doesn’t “feel” anithing and continues to show the bulb as ON.