Orbeon static autocomplete not working as expected - xpath

Question

I'm using Orbeon v2017.1 and I'd like to add an autocomplete field with a static itemset.
I've tried implementing it as it is defined here
https://doc.orbeon.com/form-runner/component/autocomplete#static
and I've also tried creating a service and action which will fill the data, but it displays it as radio buttons instead of populating the dropdown.
Is there a working example for this version of Orbeon which I could look at?
EDIT:
Here is an example of two autocomplete fields (dynamic and static)
I'm not sure if the used free web service supports filtering, so the fr-search-value was not used for the dynamic one (is it possible to filter it somehow in Orbeon for both static and dynamic?)
<xh:html xmlns:xh="http://www.w3.org/1999/xhtml"
xmlns:ev="http://www.w3.org/2001/xml-events"
xmlns:exf="http://www.exforms.org/exf/1-0"
xmlns:fb="http://orbeon.org/oxf/xml/form-builder"
xmlns:fr="http://orbeon.org/oxf/xml/form-runner"
xmlns:saxon="http://saxon.sf.net/"
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:sql="http://orbeon.org/oxf/xml/sql"
xmlns:xf="http://www.w3.org/2002/xforms"
xmlns:xi="http://www.w3.org/2001/XInclude"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xxf="http://orbeon.org/oxf/xml/xforms"
xmlns:xxi="http://orbeon.org/oxf/xml/xinclude">
<xh:head>
<xh:title/>
<xf:model id="fr-form-model" xxf:expose-xpath-types="true">
<xf:instance id="all-countries"
src="http://webservices.oorsprong.org/websamples.countryinfo/CountryInfoService.wso/ListOfCountryNamesByName/XML"/>
<!-- Main instance -->
<xf:instance id="fr-form-instance" xxf:exclude-result-prefixes="#all" xxf:index="id">
<form>
<section-1>
<country-dynamic-autocomplete label=""/>
<country-static-autocomplete label=""/>
</section-1>
</form>
</xf:instance>
<!-- Bindings -->
<xf:bind id="fr-form-binds" ref="instance('fr-form-instance')">
<xf:bind id="section-1-bind" name="section-1" ref="section-1">
<xf:bind id="country-dynamic-autocomplete-bind" ref="country-dynamic-autocomplete"
name="country-dynamic-autocomplete"/>
<xf:bind id="country-static-autocomplete-bind" ref="country-static-autocomplete"
name="country-static-autocomplete"/>
</xf:bind>
</xf:bind>
<!-- Metadata -->
<xf:instance xxf:readonly="true" id="fr-form-metadata" xxf:exclude-result-prefixes="#all">
<metadata>
<application-name>insurance</application-name>
<form-name>test</form-name>
<title xml:lang="en"/>
<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 -->
<!-- Don't make readonly by default in case a service modifies the resources -->
<xf:instance id="fr-form-resources" xxf:readonly="false" xxf:exclude-result-prefixes="#all">
<resources>
<resource xml:lang="en">
<country-dynamic-autocomplete>
<label>Countries Dynamic Autocomplete</label>
<hint/>
</country-dynamic-autocomplete>
<country-static-autocomplete>
<label>Countries Static Autocomplete</label>
<hint/>
</country-static-autocomplete>
<section-1>
<label>Country Section</label>
</section-1>
</resource>
</resources>
</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-1-control" bind="section-1-bind">
<xf:label ref="$form-resources/section-1/label"/>
<fr:grid>
<xh:tr>
<xh:td>
<fr:autocomplete xmlns:xxbl="http://orbeon.org/oxf/xml/xbl"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
id="country-dynamic-autocomplete-control"
labelref="#label"
max-results-displayed="300"
resource="http://webservices.oorsprong.org/websamples.countryinfo/CountryInfoService.wso/ListOfCountryNamesByName/XML"
bind="country-dynamic-autocomplete-bind">
<xf:label ref="$form-resources/country-dynamic-autocomplete/label"/>
<xf:hint ref="$form-resources/country-dynamic-autocomplete/hint"/>
<xf:alert ref="$fr-resources/detail/labels/alert"/>
<xf:itemset ref="/ArrayOftCountryCodeAndName/tCountryCodeAndName">
<xf:label ref="sName"/>
<xf:value ref="sISOCode"/>
</xf:itemset>
</fr:autocomplete>
</xh:td>
</xh:tr>
<xh:tr>
<xh:td>
<fr:autocomplete id="country-static-autocomplete-control" ref="country-static-autocomplete"
dynamic-itemset="false"
bind="country-static-autocomplete-bind">
<xf:label ref="$form-resources/country-static-autocomplete/label"/>
<xf:hint ref="$form-resources/country-static-autocomplete/hint"/>
<xf:alert ref="$fr-resources/detail/labels/alert"/>
<xf:itemset ref="instance('all-countries')/ArrayOftCountryCodeAndName/tCountryCodeAndName">
<xf:label ref="sName"/>
<xf:value ref="sISOCode"/>
</xf:itemset>
</fr:autocomplete>
</xh:td>
</xh:tr>
</fr:grid>
</fr:section>
</fr:body>
</fr:view>
</xh:body>
</xh:html>