Created Unassigned: System.IndexOutOfRangeException occurred in Microsoft.VisualStudio.Web.HTML.Razor.Implementation.Shims.3_0.dll [1312]

Below exception was found in the Monkey run against Rel.20919.01 as attached log shown. Is it a known issue too?

System.IndexOutOfRangeException: Index was outside the bounds of the array.
at Microsoft.VisualStudio.Web.Razor.Implementation.Shims.RazorCodeGenerator.CreateAutoBlockCompleter(PartialParseResult parseResult, TextChangetextChange)
at Microsoft.VisualStudio.Web.Razor.Implementation.Shims.RazorCodeGenerator.CheckForStructureChanges(TextChange textChange)
at Microsoft.VisualStudio.Web.Razor.Implementation.Shims.RazorCodeGenerator.CheckForStructureChanges(IEnumerable`1 changes)
at Microsoft.VisualStudio.Web.Razor.Implementation.Shims.RazorCodeGenerator.TextBuffer_OnChanged(Object sender, TextContentChangedEventArgs e)
at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.RaiseEvent[TArgs](Object sender, EventHandler`1 eventHandlers, TArgs args)