Textbox, small problem

This is an optical problem, no complaints about the functionality.
When the CCBorderStyleSingle is set, the control loses the upper horizontal line of the border.
It is ok when the textbox doesn't have the focus.

To retrace:
Start a fresh VB.
Add the Krool controls.
Set the font of the Form1 to Segoe UI, 11.
Place a textbox on the form.
Copy and paste this textbox, create a control array.
Set the borderstyle CCBorderStyleSingle to the copied textbox.
Run.
Click into the textbox that has CCBorderStyleSingle.
Now you should see this:
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