Owned types on an owner sub-type are not loaded

[ajcvickers]

See Database_concurrency_token_value_is_updated_for_all_sharing_entities

The model here has:

public class Sponsor
{
        public int Id { get; set; }
        public string Name { get; set; }
}

public class TitleSponsor : Sponsor
{
    public SponsorDetails Details { get; set; }
}

public class SponsorDetails
{
    public int Days { get; set; }
    public decimal Space { get; set; }
}

Both these queries leave Details null:

var sponsor = context.Set<TitleSponsor>().Single();

var sponsor = context.Set<TitleSponsor>().Include(e => e.Details).Single();

Tested with SQL Server

[smitpatel]

Duplicate of #15285?

[ajcvickers]

@smitpatel Probably--just wasn't sure if this was a special case.