Remove the Floating Social Bar output from inside the entry-content div in Genesis child themes, and add it just before entry-content instead.This keeps the itemprop="text" for the BlogPosting / CreativeWork itemtype from starting with the textual content of Floating Social Bar.

functions.php

<?php

add_action( 'pre_get_posts', 'mfsbig_remove_floating_social_bar', 15 );
/**
 * Remove Floating Social Bar from outputting at the top of the content.
 *
 * FSB adds these filters at pre_get_posts, priorty 10, so we'll remove them
 * just after that.
 *
 * @author Gary Jones
 * @link   https://garyjones.io/move-floating-social-bar-genesis
 */
function mfsbig_remove_floating_social_bar() {
	if ( class_exists( 'floating_social_bar' ) ) {
		remove_filter( 'the_excerpt', array( floating_social_bar::get_instance(), 'fsb' ), apply_filters( 'fsb_social_bar_priority', 10 ) );
		remove_filter( 'the_content', array( floating_social_bar::get_instance(), 'fsb' ), apply_filters( 'fsb_social_bar_priority', 10 ) );
	}
}

add_action( 'genesis_before_entry_content', 'mfsbig_add_floating_social_bar' );
/**
 * Echo the Floating Social Bar in the right place, just before the entry
 * content (after the header and entry meta) in Genesis child themes.
 *
 * As fsb() is really a function for filtering, it requires a single argument
 * (the content or excerpt), so we fool it by passing in an empty string instead.
 *
 * @author Gary Jones
 * @link   https://garyjones.io/move-floating-social-bar-genesis
 */
function mfsbig_add_floating_social_bar() {
	if ( class_exists( 'floating_social_bar' ) ) {
		echo floating_social_bar::get_instance()->fsb('');
	}
}