VSTHRD114 do not triggered on ternary conditional operator

[letarak]

Bug description

null Task value in ternary operator do not trigger violation

Repro steps

static Task First(bool flag)
{
    return flag
        ? null
        : Task.CompletedTask;
}

static Task Second(bool flag) =>
    flag
        ? null
        : Task.CompletedTask;

static Task Third(bool flag)
{
    if (flag)
    {
        return null;
    }
    else
    {
        return Task.CompletedTask;
    }
}

Expected behavior

Expect that all three methods violate the rule

Actual behavior

Only Third violate

• Version used: 17.14.15