@Catman emboldened by you apparent success I thought I would try to deal with a similar situation affecting a Fibaro Double Switch two I have where the two switches control loads in different “rooms”.
As it seemed to be reverting automatically I thought I would try changing the “Automatically configure” settings in both the parent and child devices from “Use default behaviour” to “No”. This did NOT stop the child device reverting to the same rooms as the parent.
Looking though the setting for the parent device under “Advanced” and the “Variables” tab there is a variable “ChildrenSameRoom” which was set to “1”. I used “Edit” to changed this to “0” and got a brief “Change property command sent” acknowledgement.
I then went back to the child device and under the “Advanced” “Params” tab de-ticked the “embedded” tick box and again got a brief “Change property command sent” acknowledgement.
Going back to the initial device details screen showed that there was a now a room selector, which I changed to the required room.
So far it seems to the staying put - no more wandering “Outside” - although the device name now has lots of ones after it in “recognition” of the number of tries I had before I had something that appears to work. Needless to say the DeviceNo has been increments a few times as well.
So in summary
- In parent device under “Adanced” “Variables” variable “ChildrenSameRoom” to Zero
- In child device under “Advanced” “Params” de-tick “embedded” tick box followed by “Back”
- In child device set room using drop down that appears after 2
If this doesn’t work initially then for both the parent and child device under “Settings” change “Automatically configure” to “No” and try again.
I will be interested to hear how you get on.