Dragging windows overflowing the desktop fails to render in time (occasional)

[jlj001031]

Steps to reproduce

1. Move the window to the edge of the screen, overflowing the screen
2. Minimize the window
3. Click the taskbar icon again to open the window
4. Drag the window to the middle of the screen without releasing the mouse
5. Sometimes the part that overflows the screen does not render in time (bug), but sometimes it is normal
6. Release the mouse and the page will return to normal

复现步骤

1. 将窗口拖动到桌面边缘，超出屏幕
2. 最小化窗口
3. 点击任务栏图标再次打开窗口
4. 将窗口拖回桌面中央，保持鼠标不松开
5. 有些时候超出屏幕的部分不能实时渲染显示出来，但有时候是正常的
6. 松开鼠标窗口恢复正常

Screenshot
截图

When I use the native title bar to drag the window there is no problem, the above bug occurs when using window_manager customized title bar, I also mentioned an issue in flutter describing this bug, I don't know what the problem is, I uploaded the template code of my project, the repository address is https://github.com/jlj001031/test-flutter.git

当我使用原生标题栏拖动窗口时不会有问题，使用window_manager自定义的标题栏时就会出现上述bug，我在flutter中同样提了issue描述这个bug，我不知道问题出在哪里，我上传了我项目的模板代码，仓库地址是https://github.com/jlj001031/test-flutter.git