KNX -control item with dimension

Hi,

Unsure whether I am doing something wrong or whether I have uncovered a bug.

If I define an item bound to a KNX -control channel with a Temperature dimension then OpenHAB doesn’t respond when I query the GA.

Number:Temperature              i_LookAheadTemperature      "Lookahead 1-4hr temp [%.2f %unit%]"        <temperature>   (gTemps)   { channel="knx:device:multicast:modes:outside_temperature_forecast" }

If I remove the dimension then it responds as expected.

The corresponding bridge/thing definition is:

Bridge	knx:ip:multicast "IPR Multicast" @ "KNX" [
	type="ROUTER",
	ipAddress="224.0.23.12",
	localIp="192.168.32.251",
	readingPause=50,
	responseTimeout=10,
	readRetriesLimit=3,
	autoReconnectPeriod=30 ]
	{
	  	Thing device modes "KNX Modes" @ "KNX" [ fetch=false, pingInterval=600, readInterval=0 ]
      	{
			// Heating Control Modes
			Type    switch  :      		 	PIR_Lighting_Night_Mode	      		"PIR Lighting Night Mode"   				[ ga="0/0/11" ]
			Type    switch  :      		 	Heating_Frost_Protection	      	"Heating Frost Protection"   				[ ga="0/6/8" ]
			Type    switch  :      		 	RTC_Night_Mode	      				"RTC Night Mode"   							[ ga="0/6/9" ]
			Type    switch  :      		 	RTC_Comfort_Mode	      			"RTC Comfort Mode"   						[ ga="0/6/23" ]

			Type    number-control  :      	outside_temperature_forecast	    "Outside Temperature Forecast"   			[ ga="9.001:0/6/201" ]

		}
	}

Running on Intel/Docker/OpenHAB 2.5.9 with an ABB IPR/S 3.1.1 as the bus interface.

Regards

Mark