xxforms:maxlength Not Working With Initially Non-Relevant Inputs

Hello all,

I've just run into a possible bug when using xxforms:maxlength on an xforms:input that is initially non-relevant.  The maxlength attribute is not being applied when the input becomes relevant.  I'm currently using a fairly recent nightly build of Orbeon.  Here is the code that doesn't work:

XHTML:

<xforms:input id="applicant-guardian-name-control"
                                        bind="applicant-guardian-name-bind" xxforms:maxlength="50">
        <xforms:label ref="$form-resources/applicant-guardian-name/label" />
        <xforms:alert>
           <xforms:output value="if(string-length(.) gt 50) then ('Exceeds 50 character limit') else 'Required'" />
        </xforms:alert>
</xforms:input>

Bind:

<xforms:bind id="applicant-guardian-name-bind" nodeset="LegallyResponsiblePerson/LegalRepresentivesName"
                        type="xs:string" xxforms:default="xxforms:get-request-attribute('applicantGuardianName')"
                        constraint="string-length(.) le 50" relevant="instance('fr-form-instance')/ApplicantInformation/PersonalDetails/ResponsibilityHasGuardian cast as xs:integer = 2" required="true()"/>


If I remove the relevant attribute, the maxlength is applied successfully.  Is there something I'm missing?