Hi Thomas,
Thank you for writing.
I can confirm that the observed issue appears. It is caused by an exception in the designer and the issue is already logged in our
Public Issue Tracking System. Feel free to add your vote for it here:
http://www.telerik.com/support/pits.aspx#/details/Issue=13781.
For the time being, please consider introducing the desired settings in code;
I hope this helps.
Regards,
Plamen
the Telerik team