Correct flag – wrong currency – After caching

Hello,

i am using multi currency.
I use Nitropack to Purge Cache and optimaze my site.

After i click on “Purge Cache” in Nitropack, Multi Currency is working perfectly. When i connect from different VPN Servers it shows me every perfectly fine.

But once the optimazation of the site is done by nitropack (after 30 Minutes), its not working anymore.

When i visit the site from USA for example, at first it shows me the Flag of the European Union, for like 2 Seconds, then it changes it to US which is correct, but the Currency remains Euro instead of USD.

Thank you in advance 🙂