Reply To: Split: New features after licence purchasing are not available

Try to add the following PHP code snippet to the child theme functions.php file to fix this

add_action( 'post_thumbnail_id', function ($img) {
	remove_filter( 'post_thumbnail_id', array( XTS\Modules\Frequently_Bought_Together\Frontend::get_instance(), 'update_variation_image' ), 10, 2 );

	return $img;
}, 1);