The autofix column feature does not work properly if you enable sorting on the grid. You can see the issue if you open the Dojo for the following demo: https://docs.telerik.com/kendo-ui/knowledge-base/grid-autofit-all-columns-width
If you sort e.g. by column "Ship Country" and sort ascending you will see the name of the column ending with "..." but not the icon for the sort direction. If you press the column again and sort descending than everything works as expected - the column width increases and the icon is show.
I tested the problem in multiple browsers, but the main browser I have to support will be the IE.