Use this snippet to prevent Product Bundles from displaying bundle prices in range format.

woocommerce-bundles-old-style-price.php

<?php
/**
 * Plugin Name: WooCommerce Product Bundles - Prevent Range-Format Prices
 * Plugin URI: https://woocommerce.com/products/product-bundles/
 * Description: Use this snippet to prevent Product Bundles from displaying bundle prices in range format.
 * Version: 1.0
 * Author: SomewhereWarm
 * Author URI: https://somewherewarm.gr/
 * Developer: Manos Psychogyiopoulos
 *
 * Requires at least: 4.1
 * Tested up to: 5.3
 *
 * Copyright: © 2017-2020 SomewhereWarm SMPC ([email protected]).
 * License: GNU General Public License v3.0
 * License URI: http://www.gnu.org/licenses/gpl-3.0.html
 */
 
// To use this snippet, download this file into your plugins directory and activate it, or copy the code under this line into the functions.php file of your (child) theme.
 
add_filter( 'woocommerce_bundle_force_old_style_price_html', '__return_true' );