TAdvPanel: Artefact when styled

When I use the TAdvPanel on a styled form, there's a small artefact (looking like a rectangle) on the caption on the left.

To reproduce set a style like Carbon for the app and place a TAdvPanel on it and set the following properties to expose the issue:

  with AdvPanel1  do
  begin
    Caption.GradientDirection := gdHorizontal;
    Caption.Color             := StyleServices.GetSystemColor(clBtnHighlight);
    Caption.ColorTo           := StyleServices.GetSystemColor(clBtnShadow);
    Caption.MinMaxButton      := True;
    Caption.MinMaxButtonColor := StyleServices.GetSystemColor(clBtnText);
    Caption.MinMaxCaption     := True;
    Caption.Text              := 'AdvPanel';
    Caption.Visible           := True;

    Font.style := [fsbold];
    Font.Color := StyleServices.GetSystemColor(clWindowText);
  end;

When the panel is collapsed the caption is fine.
When expanded there's a black rectangle on the left of the caption.
I can send screenshots if needed.

Thanks for reporting. We traced & solved this issue. The next update will address this.