Woocommerce 3.x deprecation woocommerce_order_tax_totals

In my order summary I’m geeting the following deprecation warning after upgrading to Woocommerce 3.0.4:

Notice: The “woocommerce_order_tax_totals” hook uses out of date data structures and is deprecated since version 3.0.4! Use woocommerce_order_get_tax_totals instead

After a lot of digging I tracked this down to the filter in this plugin, which is declared around line 44 in qwc-front.php. As a work-around, commenting out the line removes the warning (but possibly results in non-translation of that line in the summary table).