Sonos Muttiroom Rule not triggering

I tried to set up a rule to be able to controll my sonos speakers. Actually, the only reason to do that was to be able to play something on all speakers at the same time.
After finding this, I was confident that this schould work:

But if I sent a command to the triggering item nothing happens. OK, in the log I get a lot of JS errors, but I will check that separately.
My main question is now, why the configuration in the “triggers” section in the rule is removed all the time.

I set this:


  • id: “1”
    itemname: Sonos_Multiroom_Control
    type: core.ItemCommandTrigger

After Saving it gets replaced by:

  • id: “1”
    configuration: {}
    type: core.ItemCommandTrigger
    → so, the configuration/ triggering item is lost

Any Ideas?

Make sure that indentation on the itemname is correct.

I got it sorted out. The type of the triggering item needs to be from the type “string”