Unable to override application-status email template

I’m using current versions: WC Vendors 1.9.14, WooCommerce 3.3.5, Storefront 2.2.8, and WordPress 4.9.5. My theme is a Storefront child.

I want to modify the email message sent to users when they apply for vendorhood. I’ve copied and then modified this template:

/wp-content/plugins/wc-vendors/templates/emails/application-status.php
to:
/wp-content/themes/MYTHEME/wc-vendors/emails/application-status.php

per the instructions in “Changing the Vendor Templates”:
https://docs.wcvendors.com/knowledge-base/changing-the-vendor-templates/

The email sent to users remains the WC Vendors original without my modifications.

In troubleshooting, to make sure that no new PHP code could interfere with the process, I’ve added a simple text string to the HTML output of the template but it doesn’t appear in the received message.

I am able to successfully override other WC Vendor templates, e.g. front/vendor-main-header.php, as well as Storefront and WooCommerce templates.

Could you please verify that this email template can be properly overridden by a child theme? For example, is the email sent out by a cron job that’s operating independently and isn’t aware of the child theme?

If the problem is on my end, please suggest what I might check to pinpoint my bug.

Thanks,
Paul