Hi Petr,

Thank you for taking the time to go into detail about the issue that you have faced. Indeed, this is a defect on our side and I confirm that the bordered option is not serialized correctly. I have made the current thread visible on our feedback portal.

Also, for this report, I have updated your Telerik points accordingly. 

Meanwhile, I recommend using the following workaround as a temporary solution:

    <style>
      .k-listview,
      .k-listview-bordered{
        border: none;
      }
    </style>

Kind regards,
Tsvetomir
Progress Telerik