Support Forum
Columns cannot be changed like that. During configuration, it is an array of objects each defining the column properties. At runtime, `columns` is a Store and must be treated like that. See the documentation for more information on columns.
Confirmed, it's a bug: https://github.com/bryntum/support/issues/437
Use remove(store.getRange()) instead for now.
Use remove(store.getRange()) instead for now.