Hi Ben,
Thank you for writing.
I have tested the described case and I can confirm that it is an issue with our designer. The issue is logged here:
http://feedback.telerik.com/Project/154/Feedback/Details/128476. Feel free to add your vote/comment to it.
I have updated your
Telerik Points for this report.
Meanwhile, you can create the desired RoundRectShapes and apply them at runtime.
Regards,
Stefan
Telerik
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