Language always english with overlay checkout

[mbpictures]

Hi!

When I create a checkoutSession and open it using:

DodoPayment?.Checkout.open({
    checkoutUrl: res.result.checkoutUrl,
});

I can't change the language using the dropdown. Even when forcing the language while creating the checkout session by setting force_language to e.g. de, the overlay remains in English. When using the hosted checkout by redirecting to the checkoutUrl, the language is working fine.

[mbpictures]

Some additional observations: It seems to be a Chromium problem (it works with Firefox, but doesn't with Brave or Chrome). It also works in Chromium-based browsers when opening the iframe URL separately.