Product inventory in progress

Order http://crm.mebelok.com/admin/customorder/realizatsiya-izdeliy/1400890/edit/ Sub-process http://crm.mebelok.com/admin/customorder/logistika/1420329/edit/ Interested in product with code 130199 See order history http://crm.mebelok.com/admin/customorder/realizatsiya-izdeliy/1400890/history/?systemchange=1&filter2_key=valueold&filter2_type=search&filter2_value=&filter3_key=valuenew&filter3_type=search&filter3_value=&fieldkey=130199&customfieldid=&filtercdateto=&filtercdateto= Now in order quantity 1 We moved the process to the stage http://crm.mebelok.com/admin/shop/workflowstatus/293/action/new/ A subprocess is created from it and a reserved number is added What is the problem, in the order the number of goods is 1, and in subprocess 2, I began to figure out how it happened Started to unravel the story https://prnt.sc/upabrg In the order we chose quantity 1, and after 2 seconds it became a reserve 2 And at the time of creating the subprocess,