Repeater Template Disappears

Hello,
My template code for my repeater template keeps getting deleted every few weeks. Here is my code:

<?php $featured_image_vertical = get_field('featured_image_vertical'); ?>
<?php $featured_image_horizontal = get_field('featured_image_horizontal'); ?>

<div class="single-blog pl-lg-0 col-sm">
	<a class="h-100" href="<?php the_permalink(); ?>">
		<figure class="" style="background-position: <?php echo $featured_image_vertical; ?> <?php echo $featured_image_horizontal; ?>;background-image:url('<?php the_post_thumbnail_url(); ?>');"></figure>
			<div class="right-text">
				<div class="category">
					<?php get_template_part( 'template-parts/helpers/primary-category', 'helper' ); ?>
												
                </div>
				<h4><?php the_title(); ?></h4>
			</div>
	</a>
</div>

And then every few weeks, this code is gone and it’s just blank. Why is this happening?
Thanks.