Print backtrace on the frontend when potentially unsafe HTML is removed

acf-unsafe-html-detection-backtrace.php

<?php
add_action( 'acf/will_remove_unsafe_html', 'print_backtrace_for_unsafe_html_removal', 10, 4 );
add_action( 'acf/removed_unsafe_html', 'print_backtrace_for_unsafe_html_removal', 10, 4 );
function print_backtrace_for_unsafe_html_removal( $function, $selector, $field_object, $post_id ) {
	echo '<h4 style="color:red">Detected Potentially Unsafe HTML Modification</h4>';
	echo '<pre>';
	debug_print_backtrace();
	echo '</pre>';
}