Problem with include

<zk:zk xmlns="http://www.zkoss.org/2005/zk/native"
	xmlns:zul="http://www.zkoss.org/2005/zul"
    xmlns:zk="http://www.zkoss.org/2005/zk">
    
	<zul:panel height="120px" id="${arg.task.id}" title="${arg.task.titel}" border="normal"
		collapsible="true" closable="true" maximizable="false" apply="${taskBoardPanelCtrl}"
		style="margin-bottom:10px" draggable="true">
	         
	    <zul:panelchildren>
	    	<zul:textbox multiline="true" width="100%" style="margin:0px" value="${arg.task.description}" readonly="true"/>
		</zul:panelchildren>
	</zul:panel>
</zk:zk>

...
<zul:div onClick="" apply="${taskBoardCtrl}" 
	self="@{action(value='addNewTask', when='onClick')}" droppable="true">
	<zul:grid unless="${empty notStartedTasks}">
		<zul:columns>
			<zul:column></zul:column>
		</zul:columns>
		<zul:rows>
			<zul:row forEach="${notStartedTasks}" value="${each}">
				<include mode="instant" src="~./taskBoardPanels.zul" task="${each}"/>
			</zul:row>
		</zul:rows>
	</zul:grid>
</zul:div>
...

<tr id="aUxP70" class="z-row">
<tr id="aUxP90" class="z-row z-grid-odd">
<tr id="aUxPb0" class="z-row">

<tr id="aUxP70" class="z-row">
<td id="aUxP80-chdextr" class="z-row-inner">
<div id="aUxP80-cell" class="z-row-cnt z-overflow-hidden">
<include task="de.ppi.domain.Task@3d4817" src="~./taskBoardPanels.zul" mode="instant"></include>
</div>
</td>
</tr>