p:remoteCommand returns <eval> twice in ajax response - jsf

Question

I try to render a new page in a new window (or tab) with the link I get from a selected page object in an autoComplete component.
After trying multiple options the only chance in my opinion is to use javascript to catch the submit, trigger a remote command, that gives me a javascript call with the link attribute from the page object.
JSF-Snipplet (with reduced attributes in autoComplete)
<h:form id="autoCompleteForm">
<p:autoComplete id="autoComplete" widgetVar="autoCompleteWidget" value="#{pageBean.selectedPage}" />
<p:remoteCommand action="#{pageBean.showPage}" name="showPage" />
</h:form>
some JS:
// form submit
('#autoCompleteForm').on('submit', function(e) {
e.preventDefault();
showPage();
});
// open link
var openLink = function(pageLink) {
window.open(pageLink, '_blank');
};
Bean part for action
public void showPage() {
RequestContext context = RequestContext.getCurrentInstance();
context.execute("openLink('" + selectedPage.getLink() + ".xhtml')");
}
Everything works nice together, but the response contains the eval tag twice.
<partial-response>
<changes>
<update id="javax.faces.ViewState"><![CDATA[2851816213645347690:-2276123702509360418]]></update>
<eval><![CDATA[openLink('target.xhtml');]]></eval>
<eval><![CDATA[openLink('target.xhtml');]]></eval>
</changes>
</partial-response>
I tried different approaches with redirects or returning view names, but that all leads to no satisfying solutions (e.g. URL not changing or no new window).

Answer 1

Problem solved:
I had defined PrimePartialViewContextFactoryin my faces-config before:
<factory>
<partial-view-context-factory>org.primefaces.context.PrimePartialViewContextFactory</partial-view-context-factory>
</factory>
By removing it the application acts like expected.
This also solves a problem (JSON.parse: unexpected non-whitespace character after JSON data) with pagination and sorting in DataTables.