C++ Builder 10.2 Tokyo + TeeChart > bug? > FastLineシリーズの線が描画されないことがある

動作環境

RAD Studio 10.2 Tokyo Update 3
TeeChart Standard v2016.17.160129 32bit VCL

概要

• ある特定の線が描画されない

実装

Unit1.h

//---------------------------------------------------------------------------

#ifndef Unit1H
#define Unit1H
//---------------------------------------------------------------------------
#include <System.Classes.hpp>
#include <Vcl.Controls.hpp>
#include <Vcl.StdCtrls.hpp>
#include <Vcl.Forms.hpp>
#include <Vcl.ExtCtrls.hpp>
#include <VCLTee.Chart.hpp>
#include <VCLTee.Series.hpp>
#include <VclTee.TeeGDIPlus.hpp>
#include <VCLTee.TeEngine.hpp>
#include <VCLTee.TeeProcs.hpp>
//---------------------------------------------------------------------------
class TForm1 : public TForm
{
__published:    // IDE で管理されるコンポーネント
    TChart *Chart1;
    TFastLineSeries *Series1;
    TButton *Button1;
    void __fastcall Button1Click(TObject *Sender);
private:    // ユーザー宣言
public:     // ユーザー宣言
    __fastcall TForm1(TComponent* Owner);
};
//---------------------------------------------------------------------------
extern PACKAGE TForm1 *Form1;
//---------------------------------------------------------------------------
#endif

Unit1.cpp

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
    Series1->AddXY(2.5, 2.0);
    Series1->AddXY(3.5, 3.5);
    Series1->AddXY(3.5, 2.0);
    Series1->AddXY(2.5, 2.0);

    Chart1->LeftAxis->SetMinMax(0, 5.0);
    Chart1->BottomAxis->SetMinMax(0, 5.0);
}
//---------------------------------------------------------------------------

結果

(3.5, 2.0)から(2.5, 2.0)への線が描画されない。