Add multiple Custom views in Party Lookup (Regarding)

I have set up the Regarding lookup (in Email entity) to show only Incidents and a custom entity, called Problem.

I can set up through JavaScript a custom view (filtered) only for one of these entities, but not for both.

How can I have multiple custom views for this lookup?

document.getElementById("regardingobjectid").setAttribute("defaulttype", "112");
document.getElementById("regardingobjectid").setAttribute("lookuptypenames", "Incident:112:Case,aux_problem:10036:Problem");
document.getElementById("regardingobjectid").setAttribute("lookuptypes", "112,10036");
document.getElementById("regardingobjectid").setAttribute("lookuptypeIcons", "/_imgs/ico_18_112.gif:../WebResources/aux_problem_icon_16");

setCasesView("aux_account", "regardingobjectid", false);

 I call here to setProblemsView, the same as setCasesView but not setting it as default (with the false at the end)

Xrm.Page.getControl(lookupFieldName).addCustomView(viewId, entityName, viewDisplayName, fetchXml, layoutXml, false);

But is not applying my filtered view when I choose problems Problems

function setCasesView(entityFieldName, lookupFieldName, resetSelection) {

    // use randomly generated GUID Id for the view
    var viewId = "{xxxxxxxx-xxxx-0000-9FB6-58E69E4C81AA}";

    var entityName = "incident";

    // give the custom view a name
    var viewDisplayName = "Cases in Account: " + accname + "";

    // find all cases where account is the account selected
    var fetchXml = ...
    var layoutXml = ...

    Xrm.Page.getControl(lookupFieldName).addCustomView(viewId, entityName, viewDisplayName, fetchXml, layoutXml, true);
    document.getElementById(lookupFieldName).setAttribute("disableViewPicker", "1");
}