Bug report

When a custom bundle is created the kendo.aspnetmvc script is not placed on the correct order. Thus, in some scenarios errors occur. For example if a custom kendo script is created using the following kendo-config.json and MultiColumnComboBox is used with ServerFiltering enabled and error will be thrown:

{
  "version": "2026.2.520",
  "components": [
    {
      "file": "kendo.aspnetmvc.js",
      "features": []
    },       
    {
      "file": "kendo.dropdownlist.js",
      "features": []
    },
    {
      "file": "kendo.multicolumncombobox.js",
      "features": []
    }
  ]
}

Reproduction of the problem

1. Run the attached sample. In the sample a custom bundle as explained above is used. TelerikAspNetCoreApp1.zip
2. Try to select values in the DropDownList or MultiColumnCombobox

Current behavior

The bundle builder allows kendo.aspnetmvc.js to run before the widgets whose UI for ASP.NET Core helpers it augments. The data in the components is not filtered and the following error is thrown:

Uncaught TypeError: kendo.ui.MultiColumnComboBox.requestData is not a function

Expected/desired behavior

The kendo.aspnetmvc.js schould be ordered correctly by the custom script builder, so errors to be avoided and the components to work as expected.

TicketID:

1716198

Environment

• Kendo/Telerik version: 2026.2.520
• Browser: [all ]