[CS8602] 'Dereference of a possibly null reference': False positive on property of generic interface

[wsy]

Analyzer

Diagnostic ID: CS8602: Dereference of a possibly null reference

Analyzer source

SDK: Built-in CA analyzers in .NET 8 SDK or later

Version: SDK 8.0.400

Describe the bug

Steps To Reproduce

Sample code

#nullable enable
public interface IData1<TId>
{
    TId Id { get; }
}

public interface IData2<TId>
{
    TId? Id { get; }
}

public class SampleClass<TId>
{
    private IQueryable<IData1<TId>> dataStorage1;
    private IQueryable<IData2<TId>> dataStorage2;
    public IData1<TId>? GetById1(TId id) => dataStorage1.SingleOrDefault(c => c.Id.Equals(id));
    public IData2<TId>? GetById2(TId id) => dataStorage2.SingleOrDefault(c => c.Id.Equals(id));
}

Expected behavior

Method GetById2 shall generate CS8602 because property Id has type TId?.
Method GetById1 shall not generate CS8602 because property Id has type TId.

Actual behavior

Both GetById1 and GetById2 will generate CS8602.