RC2. Bad SQL strategy when LINQ lambda where clause contains references hierarchy

[AR1ES]

I have a three models with one-to-one relationship. I need to use these relations in where clause. But instead of a single query EF executes multiple SQL statements.
Models (only relations):

    public class PlayerModel {
        public virtual PlayerOnlineModel PlayerOnline { get; set; }
    }

    public class PlayerOnlineModel {
        public virtual PlayerModel Player { get; set; }
    }

    public class AdminModel {
        public virtual PlayerModel Player { get; set; }
    }

My LINQ expression:

    var players = await _db.Admins
        .Where(p => p.Player != null && p.Player.PlayerOnline != null)
        .ToListAsync();

I expect SQL like this:

SELECT XXX
FROM [Admins] AS [p]
LEFT JOIN [Players] AS [p.Player] ON [p].[PlayerId] = [p.Player].[Id]
LEFT JOIN [PlayersOnline] AS [p.Player.PlayerOnline] ON [p.Player.PlayerOnline].[Id] = [p.Player].[Id]
WHERE [p.Player].[Id] IS NOT NULL AND [p.Player.PlayerOnline].[Id] IS NOT NULL

Or like this:

SELECT XXX
FROM [Admins] AS [p]
JOIN [Players] AS [p.Player] ON [p].[PlayerId] = [p.Player].[Id]
JOIN [PlayersOnline] AS [p.Player.PlayerOnline] ON [p.Player.PlayerOnline].[Id] = [p.Player].[Id]

But real result contains two SQL statements:

SELECT XXX
FROM [PlayersOnline] AS [p.Player.PlayerOnline]


SELECT XXX
FROM [Admins] AS [p]
LEFT JOIN [Players] AS [p.Player] ON [p].[PlayerId] = [p.Player].[Id]
WHERE [p].[PlayerId] IS NOT NULL

[maumar]

duplicate of #4588