would it make a difference when you use this? :
<?php if( have_rows('content') ):
while( have_rows('content') ): the_row();
$the_headline = get_sub_field('headline');
$the_text_content = get_sub_field('text_content');
?>
<h1><?php echo $the_headline; ?></h1>
<p><?php echo $the_text_content; ?></p>
<?php endwhile; ?>
<?php endif; ?>
