Itemset pointing to non-relevant nodes (Form Builder)

form.xml

<xh:html xmlns:xh="http://www.w3.org/1999/xhtml" xmlns:xf="http://www.w3.org/2002/xforms"
         xmlns:xs="http://www.w3.org/2001/XMLSchema"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:ev="http://www.w3.org/2001/xml-events"
         xmlns:xi="http://www.w3.org/2001/XInclude"
         xmlns:xxi="http://orbeon.org/oxf/xml/xinclude"
         xmlns:xxf="http://orbeon.org/oxf/xml/xforms"
         xmlns:exf="http://www.exforms.org/exf/1-0"
         xmlns:fr="http://orbeon.org/oxf/xml/form-runner"
         xmlns:saxon="http://saxon.sf.net/"
         xmlns:sql="http://orbeon.org/oxf/xml/sql"
         xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
         xmlns:fb="http://orbeon.org/oxf/xml/form-builder">
    <xh:head>
        <xh:title>Untitled Form</xh:title>
        <xf:model id="fr-form-model" xxf:expose-xpath-types="true">

            <!-- Main instance -->
            <xf:instance id="fr-form-instance" xxf:exclude-result-prefixes="#all" xxf:index="id">
                <form>
                    <section>
                        <colors>blue</colors>
                        <show-unreasonable>true</show-unreasonable>
                        
                    </section>
                </form>
            </xf:instance>

            <!-- Bindings -->
            <xf:bind id="fr-form-binds" ref="instance('fr-form-instance')">
                <xf:bind id="section-bind" name="section" ref="section">
                    <xf:bind id="colors-bind" ref="colors" name="colors"/>
                    <xf:bind id="show-unreasonable-bind" ref="show-unreasonable" name="show-unreasonable"
                             type="xf:boolean"/>
                    
                </xf:bind>
            </xf:bind>

            <!-- Metadata -->
            <xf:instance xxf:readonly="true" id="fr-form-metadata" xxf:exclude-result-prefixes="#all">
                <metadata>
                    <application-name>a</application-name>
                    <form-name>a</form-name>
                    <title xml:lang="en">Untitled Form</title>
                    <description xml:lang="en"/>
                </metadata>
            </xf:instance>

            <!-- Attachments -->
            <xf:instance id="fr-form-attachments" xxf:exclude-result-prefixes="#all">
                <attachments>
                    <css mediatype="text/css" filename="" size=""/>
                    <pdf mediatype="application/pdf" filename="" size=""/>
                </attachments>
            </xf:instance>

            <!-- All form resources -->
            <xf:instance id="fr-form-resources" xxf:exclude-result-prefixes="#all">
                <resources>
                    <resource xml:lang="en">
                        <colors>
                            <label>Colors</label>
                            <hint/>
                            <item>
                                <label>Blue</label>
                                <hint/>
                                <value>blue</value>
                            </item>
                            <item>
                                <label>Red</label>
                                <hint/>
                                <value>red</value>
                            </item>
                        </colors>
                        <show-unreasonable>
                            <label>Show unreasonable</label>
                            <hint/>
                        </show-unreasonable>
                        <section>
                            <label>Section</label>
                        </section>
                        
                    </resource>
                </resources>
            </xf:instance>
            
            <xf:bind ref="instance('fr-form-resources')/resource/colors/item[value = 'red']"
                     relevant="instance('fr-form-instance')/section/show-unreasonable/string() = 'true'"/>

            <!-- Utility instances for services -->
            <xf:instance id="fr-service-request-instance" xxf:exclude-result-prefixes="#all">
                <request/>
            </xf:instance>

            <xf:instance id="fr-service-response-instance" xxf:exclude-result-prefixes="#all">
                <response/>
            </xf:instance>

        </xf:model>
    </xh:head>
    <xh:body>
        <fr:view>
            <fr:body xmlns:xbl="http://www.w3.org/ns/xbl" xmlns:p="http://www.orbeon.com/oxf/pipeline"
                     xmlns:oxf="http://www.orbeon.com/oxf/processors">
                <fr:section id="section-control" bind="section-bind">
                    <xf:label ref="$form-resources/section/label"/>
                    <fr:grid>
                        <xh:tr>
                            <xh:td>
                                <xf:select1 id="colors-control" appearance="full" bind="colors-bind">
                                    <xf:label ref="$form-resources/colors/label"/>
                                    <xf:hint ref="$form-resources/colors/hint"/>
                                    <xf:alert ref="$fr-resources/detail/labels/alert"/>
                                    <xf:itemset ref="$form-resources/colors/item">
                                        <xf:label ref="label"/>
                                        <xf:value ref="value"/>
                                        <xf:hint ref="hint"/>
                                    </xf:itemset>
                                </xf:select1>
                                
                            </xh:td>
                            <xh:td>
                                <fr:yesno-input xmlns="http://orbeon.org/oxf/xml/form-builder"
                                                xmlns:xxbl="http://orbeon.org/oxf/xml/xbl"
                                                id="show-unreasonable-control"
                                                bind="show-unreasonable-bind">
                                    <xf:label ref="$form-resources/show-unreasonable/label"/>
                                    <xf:hint ref="$form-resources/show-unreasonable/hint"/>
                                    <xf:alert ref="$fr-resources/detail/labels/alert"/>
                        
                        
                                </fr:yesno-input>
                            </xh:td>
                        </xh:tr>
                    </fr:grid>
                </fr:section>
            </fr:body>
        </fr:view>
    </xh:body>
</xh:html>