Lags in column values ​​after decreasing the number of columns

[SokurenkoED]

Hi!

Sometimes I need decrease and increase the number of columns in TreeDataGrid. I get lags after decreasing the number of column.

I will try explain deeply.
I need to show and edit the values in collection using a TreeDataGrid. I solved this using Converter. Index of collection i provide like ConverterParametr. When i increase the number of column after creation, it will be work correctly. But if i decrese the number of columns and then increase it, i will have lags with showing values in cells. Values changing, when i change width of my window.

Also i noticed that converter try to set wrong ConverterParametr to cell. But if i hide column and show again by changing width of windows, it will be repair.

(Lets see the short videos).
https://github.com/user-attachments/assets/bc48fd76-53ac-4387-9af2-84cb29c477d9

LagsTreeDataGrid2.mp4