An order opened for editing in the application is locked for 90 seconds. During the process of working with the order, for correct operation, it can be locked again until the moment of exiting the order. When exiting the order in the application, it is unlocked by the cash register server. If the request from the application to unlock the order does not reach the cash register server (network problems or unavailability of the cash register server), the order will remain locked both at the cash register and in the application. In this case, after 1.5 minutes, the cash register server will unlock the order automatically.