Bug with [woocommerce_order_tracking] shortcode

Hello,

First thanks for this plugin! But I just noticed a bug.

We are using the WooCommerce default shortcode [woocommerce_order_tracking] to display a order tracking form.
When we use your plugin, the customer can not find the related order. I guess that this shortcode does not search in your custom order number field any only looks for the post ID.

Any idea how to fix this?

Cheers & Thanks!