[Plugin: Multiple Content Blocks] Fields Not Showing After custom query loop

I’ve ran into some problems using this plugin. On the first sections of my page template, the content blocks are working, until I tried adding a new one after a section where I have a custom query loop.

Like this:

<section1>
    <?php the_block('front-s1-heading', array('label'=>'Section 1 - Big Red Text', 'type' => 'one-liner' )); // Working ?>
</section1>

<section2>
    <?php
			// Define custom query parameters
			$custom_query_args = array(
				'posts_per_page' => '1',
				'post_type' => 'testimonial',
				'post_status' => 'publish',
				'order' => 'ASC'
			);

			// Get current page and append to custom query parameters array
			$custom_query_args['paged'] = get_query_var( 'page' ) ? get_query_var( 'page' ) : 1;

			// Instantiate custom query
			$custom_query = new WP_Query( $custom_query_args );

			// Pagination fix
			$temp_query = $wp_query;
			$wp_query   = NULL;
			$wp_query   = $custom_query;

			if ($wp_query->have_posts()) : while ($wp_query->have_posts()) : $wp_query->the_post(); ?>

				<div id="testimonial-<?php the_ID(); ?>" class="testimonial-item center-block">
					<hr>
					<div class="row">
						<div class="testimonial-em col-md-6">
							<h3 class="testimonial-title"><?php the_field('big_text'); ?></h3>
						</div>
						<div class="testimonial-rg col-md-6">
							<?php the_content(); ?>
							<p>- <?php the_title(); ?></p>
						</div>
					</div>
				</div>

			<?php endwhile; ?>

				<?php //the_posts_navigation(); ?>

			<?php endif;
			wp_reset_postdata();

			// Reset main query object
			$wp_query = NULL;
			$wp_query = $temp_query;
		?>
</section2>

<section3>
    <?php the_block('front-s3-heading', array('label'=>'Section 3 - Big Red Text', 'type' => 'one-liner' )); // NOT Working ?>
</section3>

I tried removing the section with the custom loop and the blocks are showing.

P.S. I’m using another plugin (Advanced Custom Fields), and tried removing this code <?php the_field('big_text'); ?> but it’s still not working.