If you enable Flat Catalog Product in Catalog/Storefront => the configurable swatches disappear from the layered navigation /filter. (sidebar) ### Preconditions 1. Magento 2.1.8 2. Flat Catalog Product set to YES 3. Have at least 2 or 3 configurable products with different colors. ### Steps to reproduce Set Flat catalog product to Yes Create color swatches (configurable products) (multiple products) ### Expected result In side bar you should have your swatches where you click on it and all products change color. This only works if flat catalog product is disabled. ### Actual result The configurable swatches don't show up. If you disable flat catalog product, then they show up in the layered navigation.