Tax applied to redeemed points despite “no tax” setting, order total mismatches emails

When the setting to not tax redeemed points is disabled in WPC Smart Points and Rewards, that setting is being ignored suddenly in an order today. Redeemed points still have tax applied on the order itself.

The emails sent to both the customer and the admin were correct. They did not deduct tax from the redeemed points, so the totals shown in those emails were accurate.

The problem is on the WooCommerce order page. When you open the order, tax was deducted from the redeemed points, and the order total there does not match what was in the emails.

To fix it, the order had to be opened manually, the tax on the redeemed points removed manually, and the order updated. Only then did the order total match the emails.

This looks like a bug in how the plugin calculates tax on the order record versus what it sends in the notification emails.