Bug report

Regression introduced in R3 2021 SP2.

Reproduction of the problem

Dojo example: https://dojo.telerik.com/IKIhazAm

1. Open the browser devtools console.
2. Reorder the columns of the TreeList

Current behavior

A js exception is thrown:

Uncaught TypeError: Cannot read properties of undefined (reading 'lockable')

Expected/desired behavior

The columns are reordered and no exceptions are thrown.

Environment

• Kendo UI version: 2021.3.1207
• jQuery version: x.y
• Browser: [all]