crashes on ctrl+c #6

crashes on ctrl+c copy, using WinForms .Net 8 on windows 10 x64.
any workarounds?

Stack trace:

System.ArgumentNullException: Value cannot be null. (Parameter 'second')
at System.Linq.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument)
at System.Linq.Enumerable.Intersect[TSource](IEnumerable1 first, IEnumerable1 second, IEqualityComparer1 comparer) at FastColoredTextBoxNS.Text.ExportToRTF.GetRtfDescriptor(IEnumerable1 styles)
at FastColoredTextBoxNS.Text.ExportToRTF.Flush(StringBuilder sb, StringBuilder tempSB, IEnumerable`1 currentStyles)
at FastColoredTextBoxNS.Text.ExportToRTF.GetRtf(TextSelectionRange r)
at FastColoredTextBoxNS.FastColoredTextBox.OnCreateClipboardData(DataObject data)
at FastColoredTextBoxNS.FastColoredTextBox.Copy()
at FastColoredTextBoxNS.FastColoredTextBox.DoAction(FCTBAction action)
at FastColoredTextBoxNS.FastColoredTextBox.ProcessKey(Keys keyData)
at FastColoredTextBoxNS.FastColoredTextBox.OnKeyDown(KeyEventArgs e)
at System.Windows.Forms.Control.ProcessKeyEventArgs(Message& m)
at FastColoredTextBoxNS.FastColoredTextBox.ProcessKeyMessage(Message& m)
at System.Windows.Forms.Control.WmKeyChar(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(HWND hWnd, MessageId msg, WPARAM wparam, LPARAM lparam)
at Windows.Win32.PInvoke.DispatchMessage(MSG* lpMsg)
at System.Windows.Forms.Application.ComponentManager.Microsoft.Office.IMsoComponentManager.FPushMessageLoop(UIntPtr dwComponentID, msoloop uReason, Void* pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(msoloop reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(msoloop reason, ApplicationContext context)