Program: 62546
Project: 62546
Buggy source:
private void refreshChannel(Channel channel){
  ZWayBridgeHandler zwayBridgeHandler=getZWayBridgeHandler();
  if (zwayBridgeHandler == null || !zwayBridgeHandler.getThing().getStatus().equals(ThingStatus.ONLINE)) {
    logger.debug("String_Node_Str");
    return;
  }
  String deviceId=channel.getProperties().get("String_Node_Str");
  if (deviceId != null) {
    DeviceList deviceList=zwayBridgeHandler.getZWayApi().getDevices();
    if (deviceList != null) {
      Device device=deviceList.getDeviceById(deviceId);
      if (device == null) {
        logger.debug("String_Node_Str");
        return;
      }
      updateState(channel.getUID(),ZWayDeviceStateConverter.toState(device,channel));
      try {
        device.update();
      }
 catch (      Exception e) {
        logger.debug(device.getMetrics().getTitle() + "String_Node_Str");
      }
    }
 else {
      logger.warn("String_Node_Str");
    }
  }
 else {
    if (channel.getUID().equals(new ChannelUID(getThing().getUID(),THERMOSTAT_MODE_CC_CHANNEL))) {
      Integer nodeId=Integer.parseInt(channel.getProperties().get("String_Node_Str"));
      ZWaveDevice physicalDevice=zwayBridgeHandler.getZWayApi().getZWaveDevice(nodeId);
      if (physicalDevice != null) {
        updateState(channel.getUID(),new DecimalType(physicalDevice.getInstances().get0().getCommandClasses().get64().getData().getMode().getValue()));
      }
    }
  }
}

Fixed version (ground truth):
private void refreshChannel(Channel channel){
  ZWayBridgeHandler zwayBridgeHandler=getZWayBridgeHandler();
  if (zwayBridgeHandler == null || !zwayBridgeHandler.getThing().getStatus().equals(ThingStatus.ONLINE)) {
    logger.debug("String_Node_Str");
    return;
  }
  String deviceId=channel.getProperties().get("String_Node_Str");
  if (deviceId != null) {
    DeviceList deviceList=zwayBridgeHandler.getZWayApi().getDevices();
    if (deviceList != null) {
      Device device=deviceList.getDeviceById(deviceId);
      if (device == null) {
        logger.debug("String_Node_Str");
        return;
      }
      try {
        updateState(channel.getUID(),ZWayDeviceStateConverter.toState(device,channel));
      }
 catch (      IllegalArgumentException iae) {
        logger.debug("String_Node_Str",iae.getMessage(),device.getMetrics().getTitle(),device.getMetrics().getLevel(),channel.getChannelTypeUID());
        updateStatus(ThingStatus.OFFLINE,ThingStatusDetail.NONE,"String_Node_Str" + device.getMetrics().getTitle() + "String_Node_Str"+ device.getMetrics().getLevel()+ "String_Node_Str"+ channel.getChannelTypeUID()+ "String_Node_Str");
      }
      try {
        device.update();
      }
 catch (      Exception e) {
        logger.debug(device.getMetrics().getTitle() + "String_Node_Str");
      }
    }
 else {
      logger.warn("String_Node_Str");
    }
  }
 else {
    if (channel.getUID().equals(new ChannelUID(getThing().getUID(),THERMOSTAT_MODE_CC_CHANNEL))) {
      Integer nodeId=Integer.parseInt(channel.getProperties().get("String_Node_Str"));
      ZWaveDevice physicalDevice=zwayBridgeHandler.getZWayApi().getZWaveDevice(nodeId);
      if (physicalDevice != null) {
        updateState(channel.getUID(),new DecimalType(physicalDevice.getInstances().get0().getCommandClasses().get64().getData().getMode().getValue()));
      }
    }
  }
}