Just stopped tracking on a clients site for several weeks – huge fail guys! – and now with the Storefront 2.2.3 update it’s the culprit in a bug that exposes the add_to_cart button jQuery on the template-homepage.php file. For this plugin to have been updated 2 weeks ago and still only be compatible up to WP 4.5.9 is unacceptable from a WooCommerce plugin. Sorry, uninstalling.