WooCommerce Product Bundles 8.1.2

* Fix - Bundled item runtime cache misses. Resolves performance issues when loading large bundles. Issue introduced in version 5.7.4.

* Fix - Wrong out-of-base catalog prices of Bundles with individually-priced items when prices defined incl. tax.
* Fix - When aggregating bundled item weights into the container item, bundled variation weights are ignored when inherited by their parent variable product.
* Tweak - Refactored bundle validation logic to make it easier to extend. Modified most back-end validation strings along the way -- these are displayed under very rare circumstances.
* Tweak - Hide "Shipped Individually" option for virtual bundled products.

* Fix - PHP warnings when updating 'array' type properties using v2 of the WC REST API.
* Tweak - Changed default bundled item image size to 'woocommerce_thumbnail' for consistency with WC 3.3 image size changes (WC 3.3+ only).