QToolButton doesn't respect QAction visibility outside QToolBar

When used outside a QToolBar, the QToolButton doesn't follow the QAction visibility attribute.

• Create an action
• Create a QToolButton, add it to a widget (not a toolbar)
• set the action to the button with setDefaultAction
• action->setVisible(false)

the button doesn't disappear. It works with any other attribute(text,enable,etc...)