After importing fonts and adding them to the library, an error occurred when saving as SVG images

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COM object that has been separated from its underlying RCW cannot be used.
   at System.Runtime.InteropServices.McgMarshal.GetInterface(__ComObject, RuntimeTypeHandle) + 0xfe
   at __Interop.ComCallHelpers.Call(__ComObject, RuntimeTypeHandle, Int32, Void*) + 0x3a
   at __Interop.ForwardComStubs.Stub_3[TThis, TResult](__ComObject, Int32) + 0x37
   at CharacterMap.Views.FontMapView.<FontMapView_Loaded>b__30_0(Object, AppNotificationMessage) + 0x20
   at CharacterMap!<BaseAddress>+0x436e8e
   at Microsoft.Toolkit.Mvvm.Messaging.WeakReferenceMessenger.Send[TMessage, TToken](TMessage, TToken) + 0x29d
   at Microsoft.Toolkit.Mvvm.Messaging.IMessengerExtensions.Send[TMessage](IMessenger, TMessage) + 0x3f
   at CharacterMap.ViewModels.FontMapViewModel.<SaveSvgAsync>d__169.MoveNext() + 0x29f
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() + 0x21
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task) + 0x70
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task) + 0x38
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task) + 0x17
   at System.Runtime.CompilerServices.TaskAwaiter.GetResult() + 0xb
   at CharacterMap.ViewModels.FontMapViewModel.<<-ctor>b__148_1>d.MoveNext() + 0x8c
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() + 0x21
   at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__7_0(Object) + 0x1e
   at System.Action`1.Invoke(T) + 0x28
   at System.Threading.WinRTSynchronizationContext.Invoker.InvokeCore() + 0x33

OS Version: 10.0.17763.316 OS Architecture: X64 App Version: 2021.3.0.0 App Culture: zh-CN

[gobifox]

After restarting the application, it returns to normal.