Error E4003 when using dxTagBox in Scheduler appointment form

Hi, I get the following error when the appointment form is opening (only for NEW appointments)

Code
2js_devextremebundle.js?v=JBttfTKizqpdh1XMPurI7liifNheO9T-dzfUolX1ejQ:23242 Uncaught Error: E4003 - Unknown filter operation is used: or. See:
http://js.devexpress.com/error/21_2/E4003
    at d (js_devextremebundle.js?v=JBttfTKizqpdh1XMPurI7liifNheO9T-dzfUolX1ejQ:23242:146317)
    at Object.Error (js_devextremebundle.js?v=JBttfTKizqpdh1XMPurI7liifNheO9T-dzfUolX1ejQ:23242:145833)
    at js_devextremebundle.js?v=JBttfTKizqpdh1XMPurI7liifNheO9T-dzfUolX1ejQ:23242:184053
    at js_devextremebundle.js?v=JBttfTKizqpdh1XMPurI7liifNheO9T-dzfUolX1ejQ:23242:184070
    at t.ctor (js_devextremebundle.js?v=JBttfTKizqpdh1XMPurI7liifNheO9T-dzfUolX1ejQ:23242:184141)
    at t.ctor (js_devextremebundle.js?v=JBttfTKizqpdh1XMPurI7liifNheO9T-dzfUolX1ejQ:23242:47661)
    at new t (js_devextremebundle.js?v=JBttfTKizqpdh1XMPurI7liifNheO9T-dzfUolX1ejQ:23242:49010)
    at Object.filter (js_devextremebundle.js?v=JBttfTKizqpdh1XMPurI7liifNheO9T-dzfUolX1ejQ:23242:186491)
    at Object.queryByOptions (js_devextremebundle.js?v=JBttfTKizqpdh1XMPurI7liifNheO9T-dzfUolX1ejQ:23242:234871)
    at js_devextremebundle.js?v=JBttfTKizqpdh1XMPurI7liifNheO9T-dzfUolX1ejQ:23242:193807

I customize the application form using "onAppointmentContextMenu".

Code
var editorOptions = {
    dataSource: new DevExpress.data.DataSource({
       // paginate: true,
        pageSize: 50,
        store: new DevExpress.data.CustomStore({
            loadMode: "raw",
            load: function (loadOptions) {
                let deferred = $.Deferred();
                deferred.resolve(optionenBenutzer);
                return deferred.promise();
            }
        })
    }),
    searchEnabled: true,
    displayExpr: "name",
    searchExpr: ['name', 'nummer'],
    valueExpr: "id"
};
             mainGroupItems.push({
                        label: {
                            text: "Mitarbeiter"
                        },
                        editorType: "dxTagBox",
                        dataField: "benutzerIdList",
                        editorOptions: editorOptions,
                    });

The field "benutzerIdList" is a array of integers, it is undefined when I create a new appointment.
When I am editing an existing appointment, everything works fine…