Menu actions are triggered despite a modal dialog being open

This code is run in a QQucikVidget placed inside a dock widget. And the shortcuts are actions set up as c++ (.ui) menu actions. One weird part is that it does accept the characters that are NOT shortcuts, only the shortcuts are fully intercepted before reaching the focused item. So perhaps the bug is there and not with the focus of the text fields? (Note that this behavior does NOT exist for c++ modal dialogs with a widget textEdit in them, nor does it happen with Qt 5.8.

The shortcuts I have been testing with are: a and Space.

Thanks beforehand!

Item {
	focus: true
	width: 500
	height: 500
	Keys.onPressed: console.log("pressed", event.key)
	Keys.onReleased: console.log("released", event.key)


	MouseArea {
		anchors.fill: parent
		onClicked: {
			dialog.open();
			print("Clicked on mouse area!");
		}
	}
	
	Dialog {
		id: dialog
		modal: true
		focus: true
		width: 200
		height: 200


		TextField {
			anchors.fill: parent
			focus: true
			text: "TextField"
		}
	}
}