Improve User Experience when buying a sould out product

Hello! I have made a test using the stock functionality of Snipcart in which I setup a product with 1 unit and tried to buy it at the same time with two clients.

Once it is bought from Client 1. Client 2 is stuck with no message error on the order page. When finishing the order, client 2 does not recieve any message of error or success, it just keeps stucked on the finish order step.

I think it is required to show a error message when this happens to help the user know that the product is sold out instead of keep him/her trying to finish its order.

There exist a possibility to fix this experience soon?

Thank you!