HikaShop Paypal Checkout payment plugin showing a different checkout form

-- url of the page with the problem -- : www.winescholarguild.com
-- HikaShop version -- : 5.1.1
-- Joomla version -- : 4.3.4
-- PHP version -- : 8.2

Hi,

after a recent update to HikaShop (not sure if it was the last version or one of the recent versions), the HikaShop Paypal Checkout payment plugin started showing a different and more complex credit card form compared to what was there before.

Here is what it looks like now:
prnt.sc/__gSzxIDklwq

Previously, this form was smaller and had PayPal styling, but now it seems to be inheriting styles from our website.

Is this normal, and if yes, where can we customize the design of this form?

Thanks