Property values are not remembered on Tab

That is really annoying that Scene Builder does not remember entered field values in properties window. For example, I need to specify prefWidth and prefHeight for a root AnchorPane. I enter prefWidth, press Tab, enter prefHeight, press Tab and get old value for prefWidth to appear.

I believe that property editor should remember any entered value unless user presses Esc or Ctrl-Z to cancel/undo his editings.