Why does the currency change after checkout on my online store?

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Topic summary

A Shopify store owner is experiencing a currency display issue with their multi-currency setup.

The Problem:

  • Customers see the correct currency during checkout and in the shopping cart
  • After completing an order and returning to the store, prices revert to Shopify’s default local currency
  • When customers add new products to cart, the currency switches back to the standard/default currency instead of maintaining their previously selected currency

Documentation:
The user has recorded a screencast demonstrating this behavior (link provided in the original post).

Status:
The issue remains unresolved with no responses or solutions offered yet. This appears to be a currency persistence problem where customer currency preferences are not being retained across sessions or after checkout completion.

Summarized with AI on November 10. AI used: claude-sonnet-4-5-20250929.
1

After placing an order, customers see the price in the local currency of Shopify. at the same time, the correct currency is displayed in the shopping cart. the problem appears when the customer makes an order, then returns to the store and sees the local currency, after adding the product to the cart, the value changes again to the standard one. I recorded a screencast at the link

https://drive.google.com/file/d/160Prd-8iUsm_HXHJLP9tuJhEr1eHHWSR/view?usp=drive_link