Android send intent opens empty documents chooser on Android 4.4.2

I have some code to share a bit of text using the SEND intent. It works fine (opens the intent chooser) on all Android versions up to 4.4.2.

On 4.4.2, a window titled "Documents" opens, which is empty. There is nothing the user can do in that window as far as I can see.

Screenshot: https://www.dropbox.com/s/pr2r84b1yjyxrne/Screenshot%202014-06-27%2014.36.15.png

Here is the intent code:

var intent = Ti.Android.createIntent({
    action: Ti.Android.SEND,
    type: 'text/plain'
});
 
intent.putExtra(Ti.Android.EXTRA_TEXT, "Text to share");
 
var chooser = Ti.Android.createIntentChooser(intent, "Share via");
Ti.Android.currentActivity.startActivity(chooser);

Is this a bug? If I use the emailDialog on the same device, it presents a chooser with a list of email clients as expected, so somehow that code to open an intent chooser works but the generic intent chooser code does not.