Encountering an issue with the vertical alignment of items in the code snippet below when using Bootstrap 4. Initially, the items are stacked vertically, but they align horizontally when either the "row" or "row align-items-start" classes are applied.
<div class="container">
<div class="row align-items-start">
<h1></h1>
<form action="" method="POST">
<input class="form-control" type="text" name="name" placeholder="name">
<input class="form-control" type="text" name="name" placeholder="image URL">
<button class="btn btn-dark">
Submit!
</button>
</form>
<a href="/">Go Back</a>
</div>
</div>