external testing price not localized

Hello,
I have a problem with in app purchases on beta testing. When I tested purchases on sandbox environment the price was localized in accordance with the region specified in sandbox store account. However, when I uploaded the build for external testing, the price is not get localized( It's always presented in US dollars although the region is Russia ). And on a certain device localization is correct, but when I tap purchase button the alert pops up requiring to switch store to the US. Maybe for beta testing in-app purchases work only in the US store?