Emails "To" showing Subject

When I send an email template from a custom module, the To section is showing the Subject instead of the recipient email. When I click on it it still shows the email and sends, but it confuses people using it.

Anyone know why this is showing this way?

Moderation Update:

There is a post tracking the votes for this feature. Please follow the below post to stay updated on the progress.

https://help.zoho.com/portal/en/community/topic/how-to-send-email-from-within-a-custom-module-with-or-without-an-email-template

Thank you.