Message to customers in Woocommerce imported invoices

Hi to everyone,
I'm contacting you because I'm experiencing some issues to include the standard "Message to customers" in the invoices imported from the app "Woocommerce by Intuitor".

In the invoices generated directly from QuickBook the "Message to customers" appear but in the invoices imported from Woocommerce unfortunately no. I tried also to add an "Order Note" but also in this way the "Message to customer" is empty.

Can someone suggest me how to fix this? How can I add automatically a "Message to customers" also to the invoice imported from Woo? Is boiring, each time, open the invoice and add these informations by hand.

Thanks to everyone! :)