Studio Preferences window shows an Empty window

Studio shows an Empty Preferences window when there is an error message at pervious load.
It's an intermittent behavior. I can always reproduce this on my machine with 3.4.0 RC studio. But I couldn't reproduce for Studio 3.3.0 GA in my machine.
Anyhow, we observed the same scenario in another machine with 3.3.0 GA Studio.

Steps To Reproduce

1. Open the studio.
2. Go to Preferences > Studio > Platforms > iOS
3. Delete the Xcode from your machine
4. Press the refresh button from your studio preferences window
Now it should show an error message (refer attachment Error_Msg.png)
5. Press OK button on Preferences window
6. Open Preferences window again
( Use Menubar option Preferences > Studio > Platforms > iOS.
Don't use shortcut to open preferences window. It doesn't contain any memory regarding last opened view.)

Actual Result

Empty Preferences window is opened.
Please see attachments Screen Shot 2014-09-05 at 1.04.08 PM.png and Screen Shot 2014-09-05 at 1.04.28 PM.png

Expected Result

Studio should not open Empty Preferences window. It could open a window like Error_Msg.png

Workaround

Open the Preferences window using shortcut (Cmd + , ) in Step 6.