empty cart when the user register

-- HikaShop version -- : 4.2.3
-- Joomla version -- : 3.9.16
-- PHP version -- : 7.3
-- Browser(s) name and version -- : Safari

The plugins "Redirect Joomla registration to HikaShop plugin" and "HikaShop user synchronization plugin" are activated, no force ssl over all site. There is no email activation of new users when registering.

- The cart is empty when a user registers at checkout
- The button to save the billing address when registering a new user deletes the form and does not save the address, when you click on next it goes to the store view and empties the car.

Besides, the button to save the address when registering, clears the form and when taking the next step, no address is saved, empties the cart and takes you to the main view of the store.

I can give them access by private message, it is very urgent

works
thanks

One more thing,

When I add a new shipping address at checkout, I want the box to not appear by default: This address is also billing address. Attachment screenshot. Thank you.