Hashie IndifferentAccess assignment issue

gistfile1.txt

require 'hashie'
require 'pp'

class A < Hashie::Dash
  include Hashie::Extensions::IndifferentAccess
  property :some_array
  property :some_hash
  property :some_object
end

class B < Hashie::Dash
  property :some_array
  property :some_hash
  property :some_object
end

hash_value = {}
array_value = []
object = Object.new
a = A.new
b = B.new

a.some_hash = hash_value
a.some_array = array_value
a.some_object = object

b.some_hash = hash_value
b.some_array = array_value
b.some_object = object


pp [:a_hash, hash_value.object_id == a.some_hash.object_id]
pp [:a_array, array_value.object_id == a.some_array.object_id]
pp [:a_object, object.object_id == a.some_object.object_id]

pp [:b_hash, hash_value.object_id == b.some_hash.object_id]
pp [:b_array, array_value.object_id == b.some_array.object_id]
pp [:b_object, object.object_id == b.some_object.object_id]