OH2 zwave snapshot 2.1.0 - DCH-Z510 Siren no longer plays notification sound

I used the zwave snapshot 2.1.0.201702232319 for a long time. Now I changed to 2.1.0.201704171736. With this new snapshot it is no longer possible to play notification sound.

What I’ve done:
Item:
Number Siren01_Sound “House Sirene [%d]” { channel=“zwave:device:15a7a49f3a6:node2:notification_send”}

Rule:
sendCommand(Siren01_Sound, 0x06)

This played the sound “Access Controll 0x06)” in the past and now:

Result, no sound but log errors. How to fix it to play sound again?
2017-04-22 18:16:35.688 [ERROR] [ome.core.thing.internal.ThingManager] - Exception occured while calling handler: java.lang.NullPointerException
java.util.concurrent.ExecutionException: java.lang.NullPointerException
at java.util.concurrent.FutureTask.report(FutureTask.java:122)[:1.8.0_121]
at java.util.concurrent.FutureTask.get(FutureTask.java:206)[:1.8.0_121]
at org.eclipse.smarthome.core.common.SafeMethodCaller.callAsynchronous(SafeMethodCaller.java:188)[98:org.eclipse.smarthome.core:0.9.0.b4]
at org.eclipse.smarthome.core.common.SafeMethodCaller.call(SafeMethodCaller.java:81)[98:org.eclipse.smarthome.core:0.9.0.b4]
at org.eclipse.smarthome.core.common.SafeMethodCaller.call(SafeMethodCaller.java:65)[98:org.eclipse.smarthome.core:0.9.0.b4]
at org.eclipse.smarthome.core.thing.internal.ThingManager.receiveCommand(ThingManager.java:369)[105:org.eclipse.smarthome.core.thing:0.9.0.b4]
at org.eclipse.smarthome.core.items.events.AbstractItemEventSubscriber.receive(AbstractItemEventSubscriber.java:46)[98:org.eclipse.smarthome.core:0.9.0.b4]
at org.eclipse.smarthome.core.internal.events.OSGiEventManager$1.call(OSGiEventManager.java:192)[98:org.eclipse.smarthome.core:0.9.0.b4]
at org.eclipse.smarthome.core.internal.events.OSGiEventManager$1.call(OSGiEventManager.java:1)[98:org.eclipse.smarthome.core:0.9.0.b4]
at org.eclipse.smarthome.core.common.SafeMethodCaller$CallableWrapper.call(SafeMethodCaller.java:179)[98:org.eclipse.smarthome.core:0.9.0.b4]
at java.util.concurrent.FutureTask.run(FutureTask.java:266)[:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_121]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_121]
Caused by: java.lang.NullPointerException
at org.openhab.binding.zwave.internal.protocol.commandclass.ZWaveAlarmCommandClass.getNotificationReportMessage(ZWaveAlarmCommandClass.java:246)[203:org.openhab.binding.zwave:2.1.0.201704171736]
at org.openhab.binding.zwave.internal.converter.ZWaveAlarmConverter.receiveCommand(ZWaveAlarmConverter.java:301)[203:org.openhab.binding.zwave:2.1.0.201704171736]
at org.openhab.binding.zwave.handler.ZWaveThingHandler.handleCommand(ZWaveThingHandler.java:973)[203:org.openhab.binding.zwave:2.1.0.201704171736]
at org.eclipse.smarthome.core.thing.internal.ThingManager$4.call(ThingManager.java:372)[105:org.eclipse.smarthome.core.thing:0.9.0.b4]
at org.eclipse.smarthome.core.thing.internal.ThingManager$4.call(ThingManager.java:1)[105:org.eclipse.smarthome.core.thing:0.9.0.b4]
… 5 more

I looks a little bit in the config of the Thing definition and it looks like the parameters to play different sound are there, but how to activate them?