Hi Holger,

After performing a review on this issue we came to the conclusion that the demonstrated behavior is expected. A unique field is required so that the check functionality behaves as expected. When checkBy is used there is no guarantee that all items will be checked by a unique field which poses a limitation. Indeed a custom isChecked function should be used for such cases as documented on the following page:

https://www.telerik.com/kendo-angular-ui/components/treeview/checkboxes#multiple-check-by-item-field

 

Regards,
Svet
Progress Telerik

Hi Holger,

Thank you for the provided feedback.

Indeed, this looks like an issue on our side. This is why, I also created a new bug in our public GitHub repository where the issue can be tracked:
https://github.com/telerik/kendo-angular/issues/2265

Please accept our apologies until the issue is resolved.

I have also updated your account Telerik points for bringing this issue to our attention.

Regards,
Svetlin
Progress Telerik