[Resolved] WooCommerce order prices are unexpectedly changes, when the order status is changed to 'completed.

Problem:
If you're experiencing issues where the total price of WooCommerce orders changes unexpectedly when the order status is updated to 'completed' while using a non-default currency, we can help.
Solution:
1) First, ensure that your currency settings are correct in the Multicurrency settings of WooCommerce. For all currencies, set the thousand separator as '.' and the decimal separator as ','.
2) Update your WPML plugins to the latest versions by navigating to Plugins > Add New > Commercial and clicking 'Check for updates'. Remember to create a backup before updating.
3) Disable any security, caching, or optimizer plugins temporarily to see if the issue persists.
4) For detailed steps on adjusting currency settings, please watch this video: https://www.awesomescreenshot.com/video/37063563?key=aaaa2f7d291bb0987079a0040875e4c3

If these steps do not resolve your issue, or if the solution seems outdated or irrelevant to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the problem persists, please open a new support ticket at WPML support forum.