Version: 3.9.0
Fix - Remove duplicate multiple address information.
Add - Declared High-Performance Order Storage (HPOS) incompatibility.
Update - Security update
Fix - Exclude unnecessary files from plugin zip file.
* Fix - `Multiple Shipping` column is blank in "Customer / Order / CSV Export" plugin.
* Tweak - Transition version numbering to WordPress versioning.
* Fix - Multiple address display incorrectly in plain text email.
* Fix - Updating status of single package.
Fix - Unsupported operand types: string - string in wcms-order.php on PHP 8.
Fix - Fatal error on checkout with PHP 8.0 when virtual products added to the cart.
Fix - Missing Languages folder and .pot file in release-ready zip file.
Fix - Missing CSS and JS assets causing broken styles and functionality.
* Tweak - Refactor address validation
* Fix - Fatal error with custom billing fields added from 'woocommerce_checkout_fields' filter hook.
* Tweak - Use order CRUD classes to save or get meta data.
* Fix - Editing address in admin does not support custom address fields.
* Tweak - Remove the empty recipient-form.php file.
* Fix - Different subtotal, tax, and discount value when one cart item has multiple addresses.
* Fix - Incorrect shipping method in the order.
* Fix - Overlap select field in address form.
* Fix - Different subtotal value when discount coupon is used.
* Fix - "Undefined Index: price" notice error when using WC Composite Product plugin.
* Fix - Address array is missing in package destination.
* Fix - "Set Multiple Address" button to always show regardless of cart item quantity.
* Fix - Shipping methods always display "(incl. tax)" text regardless of tax display settings.
* Add - Save billing address fields functionality when click "Set Multiple Address" button.
* Tweak - Move the location of the "Set Multiple Address" button to shipping address area.
* Tweak - Simplify duplicate cart process.
* Fix - Taxes added even when customer is tax exempt.
* Tweak - Refactor the code for add ons compatibility.
* Fix - Use subtotal for free shipping calculation.
* Fix - Add new address button does not work in plain or numeric permalink.
* Fix - Display multiple addresses in preview order.