Vue.Draggable works in one direction, but does not want to go back - how to fix it?

Question

Vue.js

Component with table:

Vue.component('table-operations', {
    delimiters: ["{>", "<}"],
    props: ['operations', 'room_1'],
    template: '<table class="table table-bordered table-of-contents">' +

    '<tr class="table-info">' +
    '<th>ФИО</th>' +
    '<th>Дата операции</th>' +
    '<th>Кат.</th>' +
    '<th>Диагноз</th>' +
    '<th>Название опер.</th>' +
    '<th>Анест.</th>' +
    '<th>Время</th>' +
    '</tr>' +

    '<draggable v-model="operations"' +
    ':options="{group:\'operations\'}"' +
    '@add="addItem()"' +
    ':element="\'tbody\'">' +

    '<item-operation v-for="operation in operations" v-if="(operation.is_planed === false) && (operation.is_completed === false)"' +
    ':operation="operation"></item-operation>' +

    '</draggable>' +

    '</table>',
    methods: {
        addItem: function (event) {

        }
    }
})

Vue.component('item-operation', {
    delimiters: ["{>", "<}"],
    props: ['operation'],
    template: '<tr>' +
    '<td>{>operation.last_name<} {>operation.birthday<}</td>' +
    '<td>{>operation.date_operation<}</td>' +
    '<td>{>operation.pay.short_name<}</td>' +
    '<td>{>operation.diagnosis<} ({>operation.mkb<})</td>' +
    '<td>{>operation.operation_name<}</td>' +
    '<td>{>operation.anesthesia.short_name<}</td>' +
    '<td>{>operation.anesthesia_time<}</td>' +
    '</tr>'
})

It works on one side.

Back item disappears