#else preprocessor directive loses colors with conditional operator

[am11]

Observed in GitHub and VSCode v1.30.2.

The colorization is lost after : NotSupportedByX_ConditionUnmet(); line onwards.

class A
{
    static bool B { get; } =
        Condition
#if X
            ? SupportedByXOnly_ConditionMet()
            : SupportedByXOnly_ConditionUnmet();
#else
            ? NotSupportedByX_ConditionMet()
            : NotSupportedByX_ConditionUnmet();

    [MyAttribute("Z")]
    const int Y = 1;
#endif
}