function um_custom_disable_redirect( $post_ID, $post_after, $post_before ) {
    $post_obj = get_post( $post_ID );

    if ( isset( $post_obj->post_type ) && 'um_activity' == $post_obj->post_type ) {
        add_filter( 'wpseo_premium_post_redirect_slug_change', function( $bool ) {
            return true;
        }, 10, 1 );
    }
}
add_action( 'post_updated', 'um_custom_disable_redirect', 10, 3 );