Кнопка уходит в бургер меню (Bootstrap)

	<header> 
		<nav class="navbar navbar-expand-md navbar-toggleable"> 
			<a href="#" class="navbar-brand"><img src="img/barcode_zebra.png" class="rounded" alt="zebra" width="100" height="50"></a> 
 
			<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" 
			aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation"> 
				<i class="fas fa-bars"></i> 
			</button> 
 
			<div class="collapse navbar-collapse" id="navbarNav"> 
				<ul class="navbar-nav"> 
					<li class="navbar-item"> 
						<a href="#" class="nav-link">Главная</a> 
					</li> 
					<li class="navbar-item"> 
						<a href="#" class="nav-link">Документы</a> 
					</li> 
					<li class="navbar-item"> 
						<a href="#" class="nav-link">Библиотека</a> 
					</li> 
					<li class="navbar-item"> 
						<a href="#" class="nav-link">Вопросы</a> 
					</li> 
					<li class="navbar-item"> 
						<a href="#" class="nav-link">Контакты</a> 
					</li> 
				</ul> 
			</div> 
			<button class="btn"><i class="fas fa-window-close fa-2x"></i></button> 
		</nav> 
	</header>