Using c# null conditional operator breaks the rule analysis

SonarQube for IDE Visual Studio
1

Please provide

  • Windows
  • v6.12.0.59751
  • c#
  • connected mode to SonarQube (8.9.6 (build 50800))
static void Main(string[] args)
{
   object o = null;
   var test = o.ToString(); // Noncompliant, always null
   var list = new List<int>();
   //var listCount = list?.Count;

   Console.ReadLine();
}

Reports s2259. If commented line is uncommented (it uses null conditional operator), then the s2259 is no longer reported.