Unbind Space-Bar from repeating last command in Appdesigner

In Appdesigner, when you press the space bar, it automatically repeats the last Button you clicked before.

Example: You click on a 'Toggle' button with your mouse -> executes callback. You press Space-Bar -> executes 'Toggle' Button callback again. This is default Apdesigner behaviour.

The problem is that I want to use Space-Bar for something else. I have a callback-function (UIFigureKeyRelease) that executes when you release the key. So if you clicked a button before, it will execute the callback of the Button, not the UIFigureKeyRelease function.

Is there a way to disable this standard behaviour of Space-Bar in Appdesigner? The same actually goes for the Enter key.

The UIFigureKeyRelease callback:

 function UIFigureKeyRelease(app, event)
     key = event.Key;
     switch key
         case 'space'
             %% code
     end
 end

Right now, this code only executes after clicking somewhere on the UIFigure that is not a Button.