I use the A3 Lazy Load plugin to display thumbnails
and this plugin has just been updated!
1.8.9 – 2018/06/04
– This Maintenance update has 2 code tweaks for compatibility with themes and plugins that load images via the wp_kses_post sanitizer as WooCommerce does since version 3.4.0 with widgets and on Cart page.
– Tweak – Append lazy attributes to attribute list of allowed post tags list so that lazy load can run on frontend when that content is output via wp_kses_post
– Tweak – Add noscript tag to allowed post tags list to resolve duplicate image if that image is output via wp_kses_post
– Tweak – Test for compatibility with WooCommerce version 3.4.1
so it allows me to activate it now on the home page
everything is perfect !