TWebGridPanel adds unwanted row

VSC 1.56, WebCore Beta 1.3.4416
Steps to reproduce:
New empty WebCore-Project. Drop a WebGridPanel on the Form and add two WebButtons.
When Designer-Form is closed and re-opened later, there is an extra row added in the GridPanel.

Can you reproduce this behaviour ?

We could reproduce this and we're working to have this fixed.
Thanks for reporting.