Mongoid::Matchers.matches? bug

gistfile1.rb

class Game
  include Mongoid::Document
  field :title
  
  references_and_referenced_in_many :players
end

class Player
  include Mongoid::Document
  field :name
  
  references_many :games
end

player = Player.new(:name => "Dr. Seuss")
game = Game.new(:title, :players => [player])

conditions = {:player_ids => player.id}
fetched = Game.where(conditions)
fetched.count
# => 1
fetched.first.matches? conditions
# => false