Do not run shortcodes for code/pre tags.

do-not-run-shortcodes-for-code-tags.php

<?php

/**
 * Do not run shortcodes for code/pre tags (at p7) before running the shortcodes (p8).
 *
 * @param string $post_content The post content.
 *
 * @return string The filtered post content.
 */
function do_not_run_shortcodes_for_code_tags( $post_content ) {
	// Escape the shortcodes in <code> tags.
	$post_content = preg_replace_callback( '/(<code[^>]*>)(.*?)(\[|\])(.*?)(<\/code>)/si', static function ( $match ) {
		$start_tag = $match[1];
		$content   = $match[2] . $match[3] . $match[4];
		$end_tag   = $match[5];

		$content = str_replace( [ '[', ']' ], [ '&#91;', '&#93;' ], $content );

		return $start_tag . $content . $end_tag;
	}, $post_content );

	// Escape the shortcodes in <pre> tags.
	$post_content = preg_replace_callback( '/(<pre[^>]*>)(.*?)(\[|\])(.*?)(<\/pre>)/si', static function ( $match ) {
		$start_tag = $match[1];
		$content   = $match[2] . $match[3] . $match[4];
		$end_tag   = $match[5];

		$content = str_replace( [ '[', ']' ], [ '&#91;', '&#93;' ], $content );

		return $start_tag . $content . $end_tag;
	}, $post_content );

	return $post_content;
}
add_filter( 'the_content', 'do_not_run_shortcodes_for_code_tags', 7 );