Hi Naim,
Thank you for reporting this issue. I can confirm this is indeed a Bug and have also logged an issue in our public repository and you can track the progress on the item via the issue lined below:
https://github.com/telerik/kendo-ui-core/issues/6284
As a token of gratitude for helping us discover this issue I have updated your Telerik points.
Regards,
Aleksandar
Progress Telerik
Virtual Classroom, the free self-paced technical training that gets you up to speed with Telerik and Kendo UI products quickly just got a fresh new look + new and improved content including a brand new Blazor course! Check it out at https://learn.telerik.com/.