WinMan.InvalidWindowReferenceException: The window previously identified by the handle 0x000101BE has been destroyed.

**Describe the bug** Observing the following error: ``` WinMan.InvalidWindowReferenceException: The window previously identified by the handle 0x000101BE has been destroyed. at FancyWM.TilingWorkspace.RegisterWindow(IWindow window, Int32 maxTreeWidth) at FancyWM.TilingService.<>c__DisplayClass135_0.<OnWindowStateChanged>g__RegisterInTopLevelPanel|2() at FancyWM.TilingService.<>c__DisplayClass135_0.<<OnWindowStateChanged>g__RegisterAndRestoreLocation|1>d.MoveNext() --- End of stack trace from previous location --- at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__124_1(Object state) at System.Threading.QueueUserWorkItemCallback.Execute() at System.Threading.ThreadPoolWorkQueue.Dispatch() at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart() at System.Threading.Thread.StartCallback() ``` **To Reproduce** Steps to reproduce the behavior: 1. Open '...' 2. Resize '....' 3. Enable '....' 4. See error **Expected behavior** A clear and concise description of what you expected to happen. **Desktop (please complete the following information):** - OS: Microsoft Windows NT 10.0.26200.0 - FancyWM Version: 2.18.4.0 **Additional context** Add any other context about the problem here.