Got a false CS8602 warnning when use Null-conditional operator and Null-coalescing opreator in expression

Version Used:

• csc.dll: 4.13.0-3.25155.17+398aa319196d4684c751a3d7c75c847e519a393c
• .NET SDK: 9.0.203-dc7acfa194

Steps to Reproduce:

1. Compile follow code
2. Got a false CS8602 warnning

Sharplab

using System;

AnotherTestClass? anotherTestClass = null;
if (!anotherTestClass?.IsTrue ?? false)
{
    // CS8602 at `anotherTestClass`
    Console.WriteLine(anotherTestClass.IsTrue
        ? "Cancellation requested"
        : "Cancellation not requested");
}
Console.WriteLine("Test method ended");

class AnotherTestClass
{
    public bool IsTrue = false;
}

Diagnostic Id:

CS8602: Dereference of a possibly null reference.

Expected Behavior:

No warnning

Actual Behavior:

Got a falseCS8602 warnning