Scope
Usage not calculating with the new price of the addon
How to calculate usage with the new price of the addon?
Summary
When you have updated the addon price but when you are trying to add usage, it is not considering the revised price of the addon.
The usage will consider the price of the item during the billing period of the invoice. Changes outside of the billing period will only reflect in the next generated invoice.
Solution
For Example: The billing period of the draft_invoice X is 2-Jan to 2-Feb, any changes to price from 3-Feb will not be considered during the usage calculation of the draft_invoice X.
The next invoice generated will consider the updated price.
Related Articles and Documentation
Metered Billing
Add Usage via API - support article