Tellstick binding TDSensorEvent Exception - sometimes?

Hi,

I get an exception in my logs now, not sure for how long, from the Tellstick binding. I use it only to capture sensor (temperature / humidity) values from compatible devices.

    20:22:43.471 [ERROR] [ellstick.device.TellsticEventHandler] - Failed in TDSensorEvent
java.lang.NullPointerException
	at org.openhab.binding.tellstick.handler.core.TelldusCoreBridgeHandler.onRequest(TelldusCoreBridgeHandler.java:231)
	at org.tellstick.device.TellsticEventHandler.notifySensorListeners(TellsticEventHandler.java:90)
	at org.tellstick.device.TellsticEventHandler.access$2(TellsticEventHandler.java:85)
	at org.tellstick.device.TellsticEventHandler$3.invoke(TellsticEventHandler.java:170)
	at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.8.0_121]
	at java.lang.reflect.Method.invoke(Method.java:498)[:1.8.0_121]
	at com.sun.jna.CallbackReference$DefaultCallbackProxy.invokeCallback(CallbackReference.java:471)[217:org.openhab.binding.tellstick:2.1.0]
	at com.sun.jna.CallbackReference$DefaultCallbackProxy.callback(CallbackReference.java:501)[217:org.openhab.binding.tellstick:2.1.0]
20:22:44.716 [INFO ] [marthome.event.ItemStateChangedEvent] - TELLSTICK_TempHum_Uterummet_ActualTemperature changed from 9.8 to 9.9

As you ca see, at the end I get a proper temp reading. Before that, something misbehaves. Again, I only have temperature and humidity sensors connected to the Tellstick (DUO) so I can’t imagine what could have triggered an exception in the binding like that.