can call function only once

I'm having a navigationWindow that calls a child

main.js

function openTableView(e) {
    var win3 = Alloy.createController('tableView').getView();
    $.win1.openWindow(win3);
}

The child has a TableView. It gets filled calling a static function out of a commonJS module

child.js

var myCommonJSModule = require('myCommonJSModule');
var data = null;
var i = 0;
alert('I am here');
while(data == null) { //tried to fix with loop
    data = myCommonJSModule.getData();
    i++;
}
 
alert(i); //never reach this point when opening the window a second time
$.tableView.setData(data);

The commonJS module looks like this:

myCommonJSModule.getData = function() {
    var db = Ti.Database.open(_databaseName);
    var resultSet = db.execute('SELECT * FROM ' + _tableName);
    var result = [];
    while (resultSet.isValidRow()) {
        //create tableViewRow
        result.push(row);
        resultSet.next();
    }
    resultSet.close();
    db.close();
    return result;
};

In debug mode it works fine. But without the debugger or on the device the child call failes after it has been opened once. I tried to fix it with a loop, but this didn't help. I even don't get any error/exception.

What could be causing this issue?