Excel加载项-图标消失

我创建了一个包含多个宏的Excel加载项。我在.xlam文件中的“ThisWorkbook”中添加了以下代码。我可以通过“开发人员”选项卡上的“Excel加载项”按钮激活加载项。当我关闭工作簿并重新打开它时，外接程序仍然通过“Excel外接程序”按钮激活，但宏徽标不再显示在“外接程序”选项卡上。知道为什么会这样吗？加载项未被禁用，它们位于受信任的文件位置

用于在“加载项”选项卡上创建按钮的代码

通过“Excel加载项”按钮停用加载项时，从“加载项”选项卡中删除按钮的代码

Private Sub Workbook_AddinInstall()

    With Application.CommandBars("Standard").Controls.Add
        .Caption = "Save New Version"
        .FaceId = 3
        .Style = msoButtonIconAndCaptionBelow
        .OnAction = "Version_Save"
    End With
        
    With Application.CommandBars("Standard").Controls.Add
        .Caption = "Create Delivery Workbook"
        .FaceId = 263
        .Style = msoButtonIconAndCaptionBelow
        .OnAction = "DeliveryWorkbook"
    End With

End Sub

Private Sub Workbook_AddinUninstall()

    On Error Resume Next
        Application.CommandBars("Standard").Controls("Save New Version").Delete
        Application.CommandBars("Standard").Controls("Create Delivery Workbook").Delete

End Sub