I installed your plugin to get tracking info sent to customer via “completed” email. If I use the simple default email in woocommerce, it works, but otherwise it does not work if I try to make a more professional email using other plugins. There are two problems:
1) The tracking info does not get inserted into my PDF invoice (using plugin “PDF Invoices & Packing Slips for WooCommerce”)
2) The tracking info does not get inserted into my formatted “completed” email that I am using with plugin “YayMail”
So, in reality, your plugin is useless since it does not add the tracking info to my emails. Is your plugin not compatible with the the plugins that I am using. Should I use different plugins? Is there anything I can do?