How to persist the column classes in a treelist when hiding columns

[Lee]

I have a kendo treelist and need to include a column menu to show or hide columns. My column headers have classes applied to them on initialization via the headerAttributes option. After hiding a column, the remaining columns' headers lose their classes. This is duplicated in the attached dojo. Notice last name is in blue. When you hide first name using the 3 dot menu, Last Name turns black. I have tried the same thing with a kendoGrid and it works as expected. Something is off with the TreeList. How do I fix this? Note that while my example here uses text color, using a template won't solve my real issue as I need the class applied to the header cell itself so I can center the content and other stuff. 

https://dojo.telerik.com/ALeLiZUV

In troubleshooting, I noticed that grid.columns is not returning headerAttributes.class for the treelist when calling $("#myGrid).data("kendoTreeList").columns for the tree list but it is when calling $("myGrid).data("kendoGrid").columns for the grid. I'm attaching images from my own project of the two returns (Note that they are from different instances which is why the other data is not the same in the two screenshots nor do they go with the dojo.)

[Martin]

Hello, Lee,

The behaviour is a known bug which can be found in our Feedback Portal. I will raise its priority a bit so that it will move up in our bug fixing queue. 

You can consider the modified example as a temporary workaround.

Let me know if you have any further questions.

Regards,
Martin
Progress Telerik

[Lee]

Thanks. This fixed the issue.