ipad SplitWindow Detail View not Openning full width after first open

I have a simple iPad app using createSplitWindow to create a master detail window. When I open the master detail window the first time (splitWin.open();) from the calling window, all is good. When I close it (splitWin.close();) and then open it again from the initial calling window, the detail window is no longer full width. What am I missing?

var win1 = Titanium.UI.createWindow({
    backgroundColor : 'red',
    title : 'Red Window'
});
 
var imageView1 = Titanium.UI.createImageView({
    image : 'KS_nav_ui.png',
    top : 50,
    left : 30
});
imageView1.addEventListener('click', function() {
    splitWin.open();
});
 
win1.add(imageView1);
 
win1.open();
////
 
var masterLeftBtn = Ti.UI.createButton({
    title : 'Back',
    style : Titanium.UI.iPhone.SystemButtonStyle
});
var masterRightBtn = Ti.UI.createButton({
    right : 10,
    top : 30,
    image : "images/05-plus.png"
});
 
masterRightBtn.addEventListener("click", function() {
    //  drawer.toggleLeftWindow();
});
 
masterLeftBtn.addEventListener("click", function() {
    splitWin.close();
});
 
var detailLeftBtn = Ti.UI.createButton({
});
 
var detailRightBtn = Ti.UI.createButton({
    right : 10,
    top : 30,
    title : 'Edit',
    style : Titanium.UI.iPhone.SystemButtonStyle
});
 
detailRightBtn.addEventListener("click", function() {
});
 
detailLeftBtn.addEventListener("click", function() {
});
 
var detail = Ti.UI.createWindow({
    backgroundColor : '#ededed',
    translucent : false,
    title : "Session Locations",
    barColor : "#c0c0c0",
    leftNavButton : detailLeftBtn,
    rightNavButton : detailRightBtn,
    width : Ti.UI.FILL,
    height : Ti.UI.FILL
});
 
var label1 = Ti.UI.createLabel({
    text : 'Detail View'
});
 
detail.add(label1);
 
var detailNav = Ti.UI.iOS.createNavigationWindow({
    window : detail
});
 
var master = Ti.UI.createWindow({
    backgroundColor : 'gray',
    translucent : false,
    barColor : "#c0c0c0",
    //  tintColor : "green",
    leftNavButton : masterLeftBtn,
    rightNavButton : masterRightBtn,
    width : Ti.UI.FILL,
    height : Ti.UI.FILL
});
 
var label2 = Ti.UI.createLabel({
    text : 'Master View'
});
 
master.add(label2);
var masterNav = Ti.UI.iOS.createNavigationWindow({
    window : master
});
 
var splitWin = Ti.UI.iPad.createSplitWindow({
    showMasterInPortrait : true,
    detailView : detailNav,
    masterView : masterNav
});
 
splitWin.addEventListener('visible', function(e) {
    if (e.view == 'detail') {
        e.button.title = "Search";
        detail.leftNavButton = e.button;
    } else if (e.view == 'master') {
        detail.leftNavButton = null;
    }
});