Mapping fails when source type is nullable and source selector contains ternary conditional since 10.0.7

[joeclarkpodium]

The following sample unit test passes in v10.0.6, but fails in 10.0.7 where result1 is 0.

public class MapsterSample
{
    [Fact]
    public void MapsterSampleTest()
    {
        var config = TypeAdapterConfig.GlobalSettings.Fork(config =>
        {
            config.ForType<SourceClass, DestinationClass>()
                .Map(dest => dest.Value, src => src.UseSecondaryValue
                    ? src.SecondaryValue1 + src.SecondaryValue2
                    : src.PrimaryValue);
        });

        var source1 = new SourceClass
        {
            UseSecondaryValue = false,
            PrimaryValue = 100
        };
        var source2 = new SourceClass
        {
            UseSecondaryValue = true,
            SecondaryValue1 = 10,
            SecondaryValue2 = 20
        };
        
        var result1 = source1.Adapt<DestinationClass>(config);
        var result2 = source2.Adapt<DestinationClass>(config);
        
        Assert.Multiple(
            () => Assert.Equal(100, result1.Value),
            () => Assert.Equal(30, result2.Value)
        );
    }
}

public class SourceClass
{
    public bool UseSecondaryValue { get; set; }
    public int? PrimaryValue { get; set; }
    public int? SecondaryValue1 { get; set; }
    public int? SecondaryValue2 { get; set; }
}

public class DestinationClass
{
    public int Value { get; set; }
}

This seems to be something related to using a ternary conditional in the source selector in .Map and the properties on SourceClass being nullable.

Appreciate this is a strange example and that there are definitely other ways it can be achieved, but it definitely used to work and hopefully highlights the issue.

Using .NET 10.