Thank you Chris. Below is the log with debugging enabled. Based on the log, I added another item for switch_binary1, which is correctly updated in the UI.
2018-02-12 09:48:11.548 [ome.event.ItemCommandEvent] - Item 'MotionSwitchSW' received command ON
2018-02-12 09:48:11.563 [vent.ItemStateChangedEvent] - MotionSwitchSW changed from OFF to ON
==> /var/log/openhab2/openhab.log <==
2018-02-12 09:48:11.572 [DEBUG] [ding.zwave.handler.ZWaveThingHandler] - NODE 75: Command received zwave:device:xxxx:node75:switch_binary --> ON
2018-02-12 09:48:11.578 [DEBUG] [dclass.ZWaveBinarySwitchCommandClass] - NODE 75: Creating new message for application command SWITCH_BINARY_SET
2018-02-12 09:48:11.583 [DEBUG] [ocol.ZWaveController$ZWaveSendThread] - Took message from queue for sending. Queue length = 0
2018-02-12 09:48:11.583 [DEBUG] [ve.internal.protocol.ZWaveController] - Message queued. Queue length = 1. Queue={}
2018-02-12 09:48:11.588 [DEBUG] [wave.internal.protocol.SerialMessage] - Assembled message buffer = 01 0A 00 13 4B 03 25 01 FF 25 6C 3C
2018-02-12 09:48:11.586 [INFO ] [eclipse.smarthome.model.script.test2] - MotionSwitchSW = ON
2018-02-12 09:48:11.594 [DEBUG] [ing.zwave.handler.ZWaveSerialHandler] - NODE 75: Sending REQUEST Message = 01 0A 00 13 4B 03 25 01 FF 25 6C 3C
2018-02-12 09:48:11.595 [INFO ] [eclipse.smarthome.model.script.test3] - MotionSwitchSW = ON
==> /var/log/openhab2/events.log <==
2018-02-12 09:48:11.612 [vent.ItemStateChangedEvent] - zwave_serial_zstick_xxxx_serial_ack changed from 6756 to 6757
==> /var/log/openhab2/openhab.log <==
2018-02-12 09:48:11.612 [INFO ] [eclipse.smarthome.model.script.test1] - MotionSwitchSW = ON
2018-02-12 09:48:11.622 [DEBUG] [WaveSerialHandler$ZWaveReceiveThread] - Receive Message = 01 04 01 13 01 E8
==> /var/log/openhab2/events.log <==
2018-02-12 09:48:11.626 [vent.ItemStateChangedEvent] - zwave_serial_zstick_xxxx_serial_sof changed from 18859 to 18860
==> /var/log/openhab2/openhab.log <==
2018-02-12 09:48:11.631 [DEBUG] [ve.internal.protocol.ZWaveController] - Receive queue TAKE: Length=0
2018-02-12 09:48:11.635 [DEBUG] [wave.internal.protocol.SerialMessage] - Assembled message buffer = 01 04 01 13 01 E8
2018-02-12 09:48:11.638 [DEBUG] [ve.internal.protocol.ZWaveController] - Process Message = 01 04 01 13 01 E8
2018-02-12 09:48:11.640 [DEBUG] [WaveSerialHandler$ZWaveReceiveThread] - Receive Message = 01 07 00 13 6C 00 00 03 84
2018-02-12 09:48:11.646 [DEBUG] [ve.internal.protocol.ZWaveController] - Message: class=SendData[0x13], type=Response[0x01], priority=High, dest=255, callback=0, payload=01
==> /var/log/openhab2/events.log <==
2018-02-12 09:48:11.643 [vent.ItemStateChangedEvent] - zwave_serial_zstick_xxxx_serial_sof changed from 18860 to 18861
==> /var/log/openhab2/openhab.log <==
2018-02-12 09:48:11.650 [DEBUG] [l.serialmessage.SendDataMessageClass] - NODE 75: Sent Data successfully placed on stack.
2018-02-12 09:48:11.654 [DEBUG] [ve.internal.protocol.ZWaveController] - Receive queue TAKE: Length=0
2018-02-12 09:48:11.660 [DEBUG] [wave.internal.protocol.SerialMessage] - Assembled message buffer = 01 09 00 13 6C 00 00 03 00 00 8A
2018-02-12 09:48:11.664 [DEBUG] [ve.internal.protocol.ZWaveController] - Process Message = 01 09 00 13 6C 00 00 03 00 00 8A
2018-02-12 09:48:11.668 [DEBUG] [ve.internal.protocol.ZWaveController] - Message: class=SendData[0x13], type=Request[0x00], priority=High, dest=255, callback=0, payload=6C 00 00 03
2018-02-12 09:48:11.671 [DEBUG] [l.serialmessage.SendDataMessageClass] - NODE 75: SendData Request. CallBack ID = 108, Status = Transmission complete and ACK received(0)
2018-02-12 09:48:11.674 [DEBUG] [alization.ZWaveNodeInitStageAdvancer] - NODE 75: Starting initialisation from DONE
2018-02-12 09:48:11.676 [DEBUG] [ve.internal.protocol.ZWaveController] - Event Listener org.openhab.binding.zwave.internal.protocol.initialization.ZWaveNodeInitStageAdvancer@432945 already registered
2018-02-12 09:48:11.682 [DEBUG] [.serialmessage.ZWaveCommandProcessor] - Checking transaction complete: Sent Message: class=SendData[0x13], type=Request[0x00], priority=Set, dest=75, callback=108, payload=4B 03 25 01 FF
2018-02-12 09:48:11.684 [DEBUG] [.serialmessage.ZWaveCommandProcessor] - Checking transaction complete: Recv Message: class=SendData[0x13], type=Request[0x00], priority=High, dest=255, callback=0, payload=6C 00 00 03
2018-02-12 09:48:11.686 [DEBUG] [.serialmessage.ZWaveCommandProcessor] - Checking transaction complete: class=SendData, callback id=108, expected=SendData, cancelled=false transaction complete!
2018-02-12 09:48:11.688 [DEBUG] [ve.internal.protocol.ZWaveController] - Notifying event listeners: ZWaveTransactionCompletedEvent
2018-02-12 09:48:11.689 [DEBUG] [ding.zwave.handler.ZWaveThingHandler] - NODE 75: Got an event from Z-Wave network: ZWaveTransactionCompletedEvent
2018-02-12 09:48:11.691 [DEBUG] [ocol.ZWaveController$ZWaveSendThread] - NODE 75: Response processed after 94ms/4703ms.
==> /var/log/openhab2/events.log <==
2018-02-12 09:48:17.289 [vent.ItemStateChangedEvent] - zwave_serial_zstick_xxxx_serial_sof changed from 18861 to 18862
==> /var/log/openhab2/openhab.log <==
2018-02-12 09:48:17.282 [DEBUG] [WaveSerialHandler$ZWaveReceiveThread] - Receive Message = 01 0D 00 04 00 4B 07 60 0D 01 00 25 03 00 F0
2018-02-12 09:48:17.304 [DEBUG] [ve.internal.protocol.ZWaveController] - Receive queue TAKE: Length=0
2018-02-12 09:48:17.309 [DEBUG] [wave.internal.protocol.SerialMessage] - Assembled message buffer = 01 0D 00 04 00 4B 07 60 0D 01 00 25 03 00 F0
2018-02-12 09:48:17.315 [DEBUG] [ve.internal.protocol.ZWaveController] - Process Message = 01 0D 00 04 00 4B 07 60 0D 01 00 25 03 00 F0
2018-02-12 09:48:17.320 [DEBUG] [ve.internal.protocol.ZWaveController] - Message: class=ApplicationCommandHandler[0x04], type=Request[0x00], priority=High, dest=255, callback=0, payload=00 4B 07 60 0D 01 00 25 03 00
2018-02-12 09:48:17.324 [DEBUG] [ssage.ApplicationCommandMessageClass] - NODE 75: Application Command Request (ALIVE:DONE)
2018-02-12 09:48:17.328 [DEBUG] [alization.ZWaveNodeInitStageAdvancer] - NODE 75: Starting initialisation from DONE
2018-02-12 09:48:17.332 [DEBUG] [ve.internal.protocol.ZWaveController] - Event Listener org.openhab.binding.zwave.internal.protocol.initialization.ZWaveNodeInitStageAdvancer@432945 already registered
2018-02-12 09:48:17.336 [DEBUG] [ssage.ApplicationCommandMessageClass] - NODE 75: Incoming command class MULTI_INSTANCE
2018-02-12 09:48:17.340 [DEBUG] [class.ZWaveMultiInstanceCommandClass] - NODE 75: Received MULTI_INSTANCE command V2
2018-02-12 09:48:17.343 [DEBUG] [class.ZWaveMultiInstanceCommandClass] - NODE 75: Requested Command Class = SWITCH_BINARY (0x25)
2018-02-12 09:48:17.347 [DEBUG] [class.ZWaveMultiInstanceCommandClass] - NODE 75: Endpoint = 1, calling handleApplicationCommandRequest.
2018-02-12 09:48:17.352 [DEBUG] [dclass.ZWaveBinarySwitchCommandClass] - Received Switch Binary Request for Node ID = 75
2018-02-12 09:48:17.355 [DEBUG] [dclass.ZWaveBinarySwitchCommandClass] - NODE 75: Switch Binary report, value = 0
2018-02-12 09:48:17.359 [DEBUG] [ve.internal.protocol.ZWaveController] - Notifying event listeners: ZWaveCommandClassValueEvent
2018-02-12 09:48:17.363 [DEBUG] [ding.zwave.handler.ZWaveThingHandler] - NODE 75: Got an event from Z-Wave network: ZWaveCommandClassValueEvent
2018-02-12 09:48:17.367 [DEBUG] [ding.zwave.handler.ZWaveThingHandler] - NODE 75: Got a value event from Z-Wave network, endpoint = 1, command class = SWITCH_BINARY, value = 0
2018-02-12 09:48:17.370 [DEBUG] [ding.zwave.handler.ZWaveThingHandler] - NODE 75: Updating channel state zwave:device:xxxx:node75:switch_binary1 to OFF [OnOffType]
2018-02-12 09:48:17.375 [DEBUG] [.serialmessage.ZWaveCommandProcessor] - Checking transaction complete: Sent Message: class=SendData[0x13], type=Request[0x00], priority=Set, dest=75, callback=108, payload=4B 03 25 01 FF
2018-02-12 09:48:17.381 [DEBUG] [.serialmessage.ZWaveCommandProcessor] - Checking transaction complete: Recv Message: class=ApplicationCommandHandler[0x04], type=Request[0x00], priority=High, dest=255, callback=0, payload=00 4B 07 60 0D 01 00 25 03 00
2018-02-12 09:48:17.383 [DEBUG] [.serialmessage.ZWaveCommandProcessor] - Checking transaction complete: class=ApplicationCommandHandler, callback id=108, expected=SendData, cancelled=false MISMATCH