Contains.Item() fails for collections in NUnit 3.8

Hi,

just updated from NUnit 3.7.1 to 3.8.0.
Now, a test starts to fail consistently which succeeded in the past.

Repro:

```

        [Test]
        public void Collection_regression_in_380() => Assert.That(new[] { "test", "test2", "test3" }, Contains.Item("test").And.Contains("test2").And.Contains("test3"));
```


Best regards,
Ralf Koban