EF Core 2.0.2 genera più query per una sottoquery

Non sono sicuro che si tratti di un bug, ma sto riscontrando alcuni problemi di prestazioni importanti. EF Core sta generando più query per una semplice dichiarazione.

Questa è la domanda:

        var query = (from task in db.Tasks
                     let LastStatus = task.TaskStatus.Where(x => x.Deleted == false).OrderByDescending(x => x.CreatedDate).Select(x => x.Status.Name).First()
                     select new
                     {
                         task.Id,
                         LastStatus
                     }).ToList();

Risultati previsti:

SELECT [t0].[Id], (
    SELECT TOP (1) [t2].[Name]
    FROM [TaskStatus] AS [t1]
    INNER JOIN [Status] AS [t2] ON [t2].[Id] = [t1].[StatusId]
    WHERE ([t1].[TaskId] = [t0].[Id]) AND (NOT ([t1].[Deleted] = 1))
    ORDER BY [t1].[CreatedDate] DESC
    ) AS [LastStatus]
FROM [Tasks] AS [t0]

Tuttavia EF sta generando:

SELECT TOP(1) [x.Status0].[Name]
FROM [TaskStatus] AS [x0]
INNER JOIN [Status] AS [x.Status0] ON [x0].[StatusId] = [x.Status0].[Id]
WHERE ([x0].[TaskId] = @_outer_Id) AND ([x0].[Deleted] = 0)
ORDER BY [x0].[CreatedDate] DESC
Microsoft.EntityFrameworkCore.Database.Command:Information: Executed DbCommand (0ms) [Parameters=[@_outer_Id='?'], CommandType='Text', CommandTimeout='30']
SELECT TOP(1) [x.Status0].[Name]
FROM [TaskStatus] AS [x0]
INNER JOIN [Status] AS [x.Status0] ON [x0].[StatusId] = [x.Status0].[Id]
WHERE ([x0].[TaskId] = @_outer_Id) AND ([x0].[Deleted] = 0)
ORDER BY [x0].[CreatedDate] DESC

AGGIORNAMENTI Testato con EF core 2.1.0-preview2-final è rimasto lo stesso problema