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Hello sumcan,

Please share your website link to check.

Thanks

You can add this inside your functions.php file

function more_jump_link($link) {
	global $post; 

	 if ($pos=strpos($post->post_content, '<!--more-->') && in_the_loop()){
		$offset ='#more-'.$post->ID;
	}else{
		$offset='';
	}

	return $link.$offset;

}
add_filter('post_link', 'more_jump_link');

You are welcome!