UPDATE: the slowing down was because of a loop b/c the wrong ‘react’ use by me, it’s not a general issue
I’m back to the live app, Arie 
I sent a diag report.
The test version 2.10.16 also slows my Homey down, all I did was wait for some reaction between countless “homey is offline” messages.
Second, the functionality I’d like to see from a group of lights:
- When I switch the device tile on/off, or on/off per flow: turn all grouped lights on/off
- When one or more group lights are switched on, make the device tile ‘turn on’
- When the last group light is switched off, make the device tile ‘turn off’
Issue: With React option Yes, only react:
I can’t get Point 2 to work, without all group members turn on/off as well. And, when I turn a light off, while other group light(s) is/are still on, it turns on again immediately.
But what is the difference between Yes and Yes, only react?´
I just couldn’t test this.
Option Yes, but not from device updates is obviously not of use in this case.
