Hint with appearance minimal causes error.

Hello,

I believe I have ran into a bug with the following code containing a hint with appearance set to "minimal".
The following code renders an input field with two buttons to add / remove extra input fields respectively.
When you first add a new entry, remove the entry and add it again, you get a client side error with message:

Exception in client-side code.

    Message: tooltips[control.id].cfg is undefined
    File: http://localhost:13342/forms/xforms-server/6869c235695d52c931aea75789e14287541d7cf0/orbeon-0dff3e14f341fdf5f7630623be852a77cedf35bf.js
    Line number: 109


When the appearance="minimal" property is removed from the xf:hint, the code seems to work fine.

Code:

<xhtml:html
      xmlns:ev = "http://www.w3.org/2001/xml-events"
      xmlns:xf="http://www.w3.org/2002/xforms"
      xmlns:xhtml="http://www.w3.org/1999/xhtml"
      xmlns:xi="http://www.w3.org/2001/XInclude">
    <xhtml:head>
        <xf:model id="default">
       
        <xf:instance>
        <test xmlns="">
        <entry/>
        </test>
        </xf:instance>           

        </xf:model>
       
    </xhtml:head>
    <xhtml:body>
    <xf:repeat ref="entry">
    <xf:input ref=".">
    <xf:hint appearance="minimal">test</xf:hint>
    </xf:input>
    </xf:repeat>
    <xf:trigger>
    <xf:label>Add</xf:label>
    <xf:insert ev:event="DOMActivate" nodeset="entry"/>
    </xf:trigger>
    <xf:trigger>
    <xf:label>Remove</xf:label>
    <xf:delete ev:event="DOMActivate" nodeset="entry[last()]"/>
    </xf:trigger>
       
    </xhtml:body>
</xhtml:html>