Unity bug? Window can disappear when maximizing

[Gelonida N]

How to reproduce the problem:
- Open a window. (for example a terminal window)
- Right click on the top bar and select "Always on visible work space"
- I move the window to the bottom of the scrren, such, that
     only a quarter of the window is visible in the current work space.
     and the rest is below.
- I click on maximize in order to maximize the window.


The window disappears, but exists still in the process list.
At the moment all I can do is kill the window if I know it's process id.


What happens probably is following:
Unity decides to move the window into the work space below the current 
work space as the majority of the window is visible in the work space 
below and maximizes then the window.

However as I told Unity to show the window in all work spaces it seems 
to push it below all work spaces.


This is rather annoying.

I often move windows at the border of the current work space as I just 
want to monitor some text on the top of this window.
If the status message changes I'd like to maximize, perform the required 
tasks and minimize it again, such that the window is back at its initial 
place.

Is some part of the windows manager is obsessed with the idea, that he 
knows better than me where I'd like to have my windows placed this is 
impossible.

Further I don't have any idea how to get back the windows that were 
pushed outside of all work spaces.

a friendly kill will remove the process, but I'd really appreciate in 
knowing how I could restore such 'moved out window'