Hi @jamesgol, im sorry but your wrong.
I made an local wordpress instalation, two plugins: Woocommerce and yours and the storefront theme.
I’ve created the product and setted the timer to 5 minutes.
With one browser in private mode, i clicked “buy” on the product and the timer started.
Then i close the browser and waited for more than 5 minutes. When i came back, with another sesion of the private mode, the product still doesnt got avaliable.
This is the message it was showing: This item is not available at this time due to pending orders. ( ps: i didnt proceed to the checkout, just added on cart ).
Then i came to the backend and saw that the product was in stock, but also was on someone’s cart.
Resume: the product doesnt come back to the stock and leave the cart after the timer has ended.