Show first recurring event only (in main blog loop)

add_action( 'pre_get_posts', 'front_page_next_recurring_event_only', 60 );

/**
 * For events integrated into the main blog loop, only include the first upcoming instance of the
 * event.
 *
 * @param WP_Query $query
 */
function front_page_next_recurring_event_only( WP_Query $query ) {
    if ( ! isset( $query->tribe_is_multi_posttype ) || ! $query->tribe_is_multi_posttype ) return;
    $query->set( 'tribeHideRecurrence', 1 );
}