Using inner Select in a Select in a query causes an exception: No members found in this Expression

[beany]

class ContactInfo
{
   public string Email { get; set; }
   public string PhoneNumber { get; set; }
}

class Person
{
   public Guid Id { get; set; }
   public string Name { get; set; }
   public List<ContactInfo> ContactInfos { get; set; }
}

class PersonListItem
{
   public Guid Id { get; set; }
   public string Name { get; set; }
   public List<string> PhoneNumbers { get; set; }
}

Given the classes above, I would like to have a list of Person's with per person a list of PhoneNumbers. So:

var persons = _session.Query<Person>()
   .Select(x => new PersonListItem() 
      { 
         Id = x.Id, 
         Name = x.Name, 
         PhoneNumbers = x.ContactInfos.Select(y => y.PhoneNumber).ToList()
      });

But I'm getting the exception: No members found in this Expression (Parameter 'members')

I'm new to Marten, so maybe I'm missing something? Doing something wrong?

In this example it's an option to just load all since the objects are small, however I'm working with bigger structures where I don't want to load the whole document when using it for a list.