select1 tree-control in repeat not working

> Hello,
>
> A select1 tree control in combination with a xforms-repeat does not work. I'm using version 3.5M1, a code extract is included at the end of this post.
> When the "Add Material"-trigger is activated, a new "Material"-label is inserted, but the tree-control is not and an infinite loop occurs. When replacing the tree-control with a plain input control, the code works fine.
>
> Has anyone encountered this same problem?
>
> gts,
> Ronny
>
> An extract of the problematic xforms code:
> <f:group ref="materials">
>  <f:repeat nodeset="material[position() lt last()]" id="materials">
>   <h:tr>
>    <h:th>Material</h:th>
>    <h:td>
>     <f:select1 appearance="xxforms:tree" ref="material">
>      <f:itemset nodeset="instance('objectnames-list-instance')//item">
>       <f:label ref="@label"/>
>       <f:value ref="@value"/>
>      </f:itemset>
>     </f:select1>
>    </h:td>
>   </h:tr>
>  </f:repeat>
>  <h:tr>
>   <h:th  />
>   <h:td>
>    <f:trigger>
>     <f:label>Add material</f:label>
>     <f:action ev:event="DOMActivate">
>      <f:insert nodeset="material" at="index('materials')"
>         position="after"/>
>     </f:action>
>    </f:trigger>
>   </h:td>
>  </h:tr>
> </f:group>
>
>
>
>
>
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