Is this a R# issue?

I'm currentl yworking with Visual Studio 2019 16.4 Preview 2 (Enterprie Edition) and R# 2019.2.3. While working on the source code  i get the following message some times:

The stack trace is the following:

System.ArgumentOutOfRangeException : Specified argument was out of the range of valid values.
Parameter name: position
at Microsoft.CodeAnalysis.SyntaxNode.FindTokenCore(Int32 position,Boolean findInsideTrivia)
at Microsoft.CodeAnalysis.CodeRefactoringHelpers.IsNodeUnderselected(SyntaxNode node,TextSpan selection)
at async Microsoft.CodeAnalysis.IntroduceVariable.AbstractIntroduceVariableService`6.State.TryInitializeAsync[TService,TExpressionSyntax,TTypeSyntax,TTypeDeclarationSyntax,TQueryExpressionSyntax,TNameSyntax](<Unknown Parameters>)
at async Microsoft.CodeAnalysis.IntroduceVariable.AbstractIntroduceVariableService`6.State.GenerateAsync[TService,TExpressionSyntax,TTypeSyntax,TTypeDeclarationSyntax,TQueryExpressionSyntax,TNameSyntax](<Unknown Parameters>)
at async Microsoft.CodeAnalysis.IntroduceVariable.AbstractIntroduceVariableService`6.IntroduceVariableAsync[TService,TExpressionSyntax,TTypeSyntax,TTypeDeclarationSyntax,TQueryExpressionSyntax,TNameSyntax](<Unknown Parameters>)
at async Microsoft.CodeAnalysis.IntroduceVariable.IntroduceVariableCodeRefactoringProvider.ComputeRefactoringsAsync(<Unknown Parameters>)
at async Microsoft.CodeAnalysis.CodeRefactorings.CodeRefactoringService.GetRefactoringFromProviderAsync(<Unknown Parameters>)
at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)

Is this an issue of R# or Visual Studio?

Regards

Andreas