I solved, I have found and tried this and works:
This should work for you. Make the field name ‘the_content’. I am wrapping this up into a plugin and will also include the_excerpt, and featured_image.
paste this in functions.php:
function hg_acf_save_content( $value, $post_id, $field )
{
	wp_update_post( array( ‘ID’ => $post_id, ‘post_content’ =>  $value ) );
	return $value;
}
add_filter(‘acf/update_value/name=the_content’, ‘hg_acf_save_content’, 10, 3);
the only important thing is to name your desired field as:
the_content
and works!
				
		
	 
	
	
		
	
		
	
		
		
	
	
		
		
			
		
	
	
		
		
		Hi Jarvis,
I have the same problem of the first post, I did the following:
I have pasted this code in functions.php:
function custom_field_excerpt() {
	global $post;
	$text = get_field(‘extracto’);
	if ( ” != $text ) {
		$text = strip_shortcodes( $text );
		$text = apply_filters(‘the_content’, $text);
		$text = str_replace(‘]]>’, ‘]]>’, $text);
		$excerpt_length = 20; // 20 words
		$excerpt_more = apply_filters(‘excerpt_more’, ‘ ‘ . ‘[…]’);
		$text = wp_trim_words( $text, $excerpt_length, $excerpt_more );
	}
	return apply_filters(‘the_excerpt’, $text);
}
extracto is the name of the field
and pasted this, in archive.php
echo custom_field_excerpt();
but it doesn’t work… the default post element doesn’t recognize this field as the excerpt, I don’t know what is wrong, the field itself must contain some special type or something? right now is a common text field.
Help please!