In checkout default currency not current

You can see that in checkout https://ibb.co/ZYn7qmS there is DKK but in header there is CZK. I am currently at CZK site – https://www.levnejweb.cz/produkt/modern22/.

I have newest version of free + paid and I tried to disable free and paid leaving on or the other active. I tried disable plugins.

We are using Polylang PRO, and last week it worked fine. I installed Polylang for WC, which fixed few bugs. But not Curcy.