Subscription renewal email reminder showing wrong amount

[tomusborne]

Bug Report

Expected behavior

When a user upgrades their license, I expect the {amount} tag in the email to display as the correct amount that's going to be charged.

Actual behavior

The previous amount (before the upgrade) is shown in the email.

Steps to reproduce the behavior

1. User purchased a "Plus" plan for $69/year on July 10, 2022.
2. User upgraded to the "Pro" plan for $99/year on June 21, 2023.
3. User received an email on July 3, 2023 saying a renewal for $69 will happen in one week.

Information (if a specific version is affected):

PHP Version: 8.0.29

EDD Version (or branch): 3.1.3
Recurring payments: 2.11.9
WordPress Version: 6.2.2