The Leader entity drawn in C# does not follow the movement of the MText entity

It is translated from Japanese to English at DeepL.

Hi, all.

since V21, the Leader entity drawn in C# does not follow the movement of the MText entity. With the same code, there is no problem in V16 to V20.

• OS: Windows 10 Pro 64bit 20H2
• BricsCAD: V21.1.07
• Development Environment: Microsoft Visual Studio Community 2019
• Framework: .NET Framework 4.8

1. run BricsCAD V21 in Debug mode of VS2019(Load the build CsBrxMgdTest21.dll with NETLOAD).
2. execute the test command("Test2021DrawLeader") to draw the Leader and MText entities.
3. Select the MText entity that you drew.
4. Select the MText entity you drew and move it with the grip stretch.
5. The position of the Leader entity is not automatically updated.

The following message is displayed in the output window after BricsCAD is closed.

Forgot to call Dispose? (Teigha.DatabaseServices.BlockTableRecord): DisposableWrapper
Forgot to call Dispose? (Teigha.DatabaseServices.BlockTable): DisposableWrapper
Forgot to call Dispose? (Teigha.DatabaseServices.Leader): DisposableWrapper
Forgot to call Dispose? (Teigha.DatabaseServices.MText): DisposableWrapper

This issue has been occurring since V21, but not in V16 to V20.

The state of the IsDisposed property after Transaction.

---- IsDisposed ----
-> BlockTable: False
-> BlockTableRecord: False
-> Leader: False
-> MText: False

In V20, IsDisposed is set to True.

---- IsDisposed ----
-> BlockTable: True
-> BlockTableRecord: True
-> Leader: True
-> MText: True

In V21, if I Dispose after Commit, the Leader entity position is automatically updated.
Is this a bug in "Transaction" class ? specification change?

---- Test2021DrawLeader ----

[CommandMethod("Test2021DrawLeader")]
public static void Test2021DrawLeader()
{
    _AcAp.Document doc = _AcAp.Application.DocumentManager.MdiActiveDocument;
    _AcDb.Database db = doc.Database;
    _AcEd.Editor edit = doc.Editor;

    try
    {
        using (_AcDb.Transaction trans = db.TransactionManager.StartTransaction())
        {
            BlockTable bt = trans.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable;
            BlockTableRecord btr = trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;

            PromptPointOptions ppo1 = new PromptPointOptions("point1: ");
            PromptPointResult ppr1 = edit.GetPoint(ppo1);

            if (ppr1.Status != PromptStatus.OK)
            {
                return;
            }

            Point3d p1 = ppr1.Value;

            PromptPointOptions ppo2 = new PromptPointOptions("point2: ")
            {
                UseBasePoint = true,
                UseDashedLine = true,
                BasePoint = p1,
                AllowNone = true
            };

            PromptPointResult ppr2 = edit.GetPoint(ppo2);

            if (ppr2.Status != PromptStatus.OK)
            {
                return;
            }

            Point3d p2 = ppr2.Value;

            PromptResult pr = edit.GetString("\ntext: ");

            if (pr.Status != PromptStatus.OK)
            {
                return;
            }

            MText mtxt = new MText
            {
                Contents = string.IsNullOrEmpty(pr.StringResult) ? "ABC" : pr.StringResult,
                Location = p2
            };
            mtxt.SetDatabaseDefaults(db);
            ObjectId mtxtId = btr.AppendEntity(mtxt);
            trans.AddNewlyCreatedDBObject(mtxt, true);

            Leader ldr = new Leader();
            ldr.SetDatabaseDefaults(db);
            ldr.AppendVertex(p1);
            ldr.AppendVertex(p2);
            btr.AppendEntity(ldr);
            trans.AddNewlyCreatedDBObject(ldr, true);
            ldr.Annotation = mtxtId;
            ldr.EvaluateLeader();

            trans.Commit();

            edit.WriteMessage("---- IsDisposed ----\n");
            edit.WriteMessage("-> BlockTable: {0}\n", bt.IsDisposed);
            edit.WriteMessage("-> BlockTableRecord: {0}\n", btr.IsDisposed);
            edit.WriteMessage("-> Leader: {0}\n", ldr.IsDisposed);
            edit.WriteMessage("-> MText: {0}\n", mtxt.IsDisposed);
            edit.WriteMessage("\n");

            //mtxt.Dispose();
            //ldr.Dispose();
            //btr.Dispose();
            //bt.Dispose();
        }
    }
    finally
    {
        edit.Regen();
    }
}