unmountOnExit & mountOnEnter do not actually unmount the component

[Will-GuiSKJ]

I have my CSSTransitions with the unmountOnExit & mountOnEnter flags. I see my components leave the DOM, but the component's componentWillMount and componentWillUnmount are never triggered again even if I return to the page.

	public render() {
		return (
			<CSSTransition
				className="navigation-fade"
				classNames="navigation-fade"
				timeout={150}
				in={this.props.in}
				unmountOnExit
				mountOnEnter
			>
				<div