Late at night i finaly found a solution myself!
The essential point was that i’ve been searching for the phrase ‘backordered’ in the code, but that just wasn’t used where the notification is added to the emails…
What did the trick was deleting
// allow other plugins to add additional product information here
do_action( 'woocommerce_order_item_meta_start', $item_id, $item, $order, $plain_text );
// Variation
if ( ! empty( $item_meta->meta ) ) {
echo '<br/><small>' . nl2br( $item_meta->display( true, true, '_', "\n" ) ) . '</small>';
from email-order-items.php
I thought i should post this to help people with a simular issue.
