WC 2.2.10 – Broken Filter: woocommerce_reports_order_statuses

We’ve had custom order statuses and a filter on woocommerce_reports_order_statuses to include them in reporting. It has worked fine for a while. As of (at least) 2.2.10 and WP 4.1 this filter is now broken.

The reports page displays the following:

Warning: array_push() expects parameter 1 to be array, boolean given in D:\www\ns-plugins\wp-content\plugins\ns-fba-for-woocommerce\ns-fba-for-woocommerce.php on line 321

Line 321 of our plugin is inside our hooked filter function. Relevant code:

// add custom order statuses to normal reporting for woocommerce
add_filter( 'woocommerce_reports_order_statuses', array( $this, 'add_custom_status_reporting' ) );

...

/**
* Register custom statuses with WooCommerce Reporting
* see line 67 /wp-content/plugins/woocommerce/includes/admin/reports/class-wc-admin-report.php
*/
function add_custom_status_reporting( $statuses ) {
	array_push( $statuses, 'sent-to-fba');
	array_push( $statuses, 'fail-to-fba');
	return $statuses;
}

Did something break with the woocommerce_reports_order_statuses filter in a recent version? This is a pretty simple scenario. Why would the woocommerce_reports_order_statuses be sending a boolean into the hooked filter function?

Thanks!

https://wordpress.org/plugins/woocommerce/