Issue with Xiaomi Sensors conncted via Deconz (One item triggers all of the same type)

Add-ons Bindings
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1

I have an issue with my xiaomi open/close sensors connected via DECONZ/PHOSCON.
Whenever one of the sensors receive an update, e.g. gets opened, both sensors show the OPEN state in Openhab. (Same behavior can be seen with my two motion sensors)
The phoscon app in the webbrowser is correct and shows only one open sensor, so it seems like an issue with openhab or the deconz binding.

I am running the openHAB 2.5.0.RC1 on rasp3 (Openhabian) and have the latest phoscon firmware installed (dongle installed on same pi3).

Any idea why this behavior occurs?

Thank you for any help!
Chris

Here is my configuration:

//**************************************************************************
Things File: deconz.things
Bridge deconz:deconz:homeserver [ host="192.168.XXX.XXX", apikey="XXXXXXXXXX"] 

{
	//IDs have been received via REST plugin in Chrome
    openclosesensor XI_WDS_EG_Test1 "Fenstersensor Deconz" [id="10"]
    openclosesensor XI_WDS_EG_Test2 "Fenstersensor Deconz" [id="14"]
}

//**************************************************************************
Items file: deconz.items 
// AQARA WINDOW SENSOR
Contact    FenstersensorDeconzOpen          "Fenster Close/Open"    (gDeconz) {channel="deconz:openclosesensor:homeserver:XI_WDS_EG_Test1:open"}
DateTime   FenstersensorDeconzLastUpdated   "Fenster updated"       (gDeconz) {channel="deconz:openclosesensor:homeserver:XI_WDS_EG_Test1:last_updated"}

// AQARA WINDOW SENSOR 2
Contact    FenstersensorDeconzOpen2          "Fenster 2 Close/Open"    (gDeconz) {channel="deconz:openclosesensor:homeserver:XI_WDS_EG_Test2:open"}
DateTime   FenstersensorDeconzLastUpdated2   "Fenster 2 updated"       (gDeconz) {channel="deconz:openclosesensor:homeserver:XI_WDS_EG_Test2:last_updated"}

//**************************************************************************
Rules File: deconz.rules

rule "Deconz Open Close 1"
when
    Item FenstersensorDeconzOpen changed
then
	if (FenstersensorDeconzOpen.state == OPEN) {
        logInfo('Deconz', 'Deconz contact 1 open') 
    
    } 
    if (FenstersensorDeconzOpen.state == CLOSED) {
		logInfo('Deconz', 'Deconz contact 1 closed')
    }
end

rule "Deconz Open Close 2"
when
    Item FenstersensorDeconzOpen2 changed
then
	if (FenstersensorDeconzOpen2.state == OPEN) {
        logInfo('Deconz', 'Deconz contact 2 open') 
    
    } 
    if (FenstersensorDeconzOpen2.state == CLOSED) {
		logInfo('Deconz', 'Deconz contact 2 closed')
    }
end