WooCommerce 3.9.3 is a minor release and includes few bug fixes. Importantly, this contains the fix for the issue where coupon messages were not formatted properly along with updating some deprecated functions.
WooCommerce 3.9.3 Changelog
WooCommerce 3.9.3 – 2020-02-27 list of all 6 changes:
- Fix – Replaced deprecated Jetpack::is_staging_site call. #25670
- Fix – Corrected the cache invalidation behavior of order item CRUD actions. #25734
- Fix – Configure Jetpack plugin before trying to connect/register. #25742
- Fix – Check configure exists before calling to support older JP versions. #25747
- Fix – Better handling of coupon code when rendering.
- Dev – Updated WooCommerce blocks to 2.5.14 (See changelog at https://github.com/woocommerce/woocommerce-gutenberg-products-block/releases).