Conflict with Enfold in Media LIbrary

Hi,
just noticed that my Media library doesn’t show images and throws an error in row view. In grid view images are fine. I tracked it down to your plugin, when I disable it, it works fine. See below log.
I think some code should be executed only on the front-end.

Thank you very much for your plugin!

#0 /home/domain/public_html/domain.com/wp-includes/class-wp-hook.php(292): av_responsive_images->handler_wp_lazy_loading_enabled(true)
#1 /home/domain/public_html/domain.com/wp-includes/plugin.php(212): WP_Hook->apply_filters(true, Array)
#2 /home/domain/public_html/domain.com/wp-content/plugins/strong-testimonials/includes/functions-image.php(127): apply_filters('wp_lazy_loading...', true)
#3 /home/domain/public_html/domain.com/wp-includes/class-wp-hook.php(292): wpmtst_add_lazyload(Array, Object(WP_Post), 'square')
#4 /home/domain/public_html/domain.com/wp-includes/plugin. in /home/domain/public_html/domain.com/wp-content/themes/enfold/framework/php/class-responsive-images.php on line 418