Xrm.Page.getControl addPreSearch is there a bug with CRM 2016

function filterLookup() {
    try{
        // validate Case Model field data
        if (Xrm.Page.getControl("new_caseid") != null && Xrm.Page.getControl("new_caseid") != undefined) {
            //call filter method on pre search of lookup field

//Below code is being skip

            Xrm.Page.getControl("new_casemodelid").addPreSearch(addLookupFilter);
        }
                        
    } catch (e) {
        //throw error
        throw new Error(e.message);
    }
}


function addLookupFilter() {

    try
    {
        var caseLookup = Xrm.Page.getAttribute("new_caseid").getValue();
        //Validate Case Id
        if (caseLookup != null && caseLookup != undefined) {
            var caseId = caseLookup[0].id.replace(/{/g, '').replace(/}/g, '');

            //Prepare Condition for the filter
            fetchXml = "<filter type='and'><condition attribute='new_caseid' operator = 'eq' value '" + caseId + "' /></filter>";
            //Apply Filter to the lookup field
            Xrm.Page.getControl("new_casemodelid").addCustomFilter(fetchXml);

        }

    } catch (e) {
        //throw error
        throw new Error(e.message);
    }

}