Problem with hash conditions on joined tables in AR models of namespaced Rails engines

gistfile1.rb

# The namespaced table is not being determined in hash conditions. See below.

module Carrier
  class Engine < ::Rails::Engine
    isolate_namespace Carrier
  end
end

module Carrier
  class Profile < ActiveRecord::
    ...
    belongs_to :entity_type
  end
end

> Carrier::Profile.joins(:entity_type).where(entity_type: { name: "Shipper Only" })
  SELECT "carrier_profiles".* FROM "carrier_profiles" INNER JOIN "carrier_entity_types" ON "carrier_entity_types"."id" = "carrier_profiles"."entity_type_id" WHERE "entity_type"."name" = 'Shipper Only' LIMIT 1
  ActiveRecord::StatementInvalid: PG::Error: ERROR:  missing FROM-clause entry for table "entity_type"
	
> Carrier::Profile.joins(:entity_type).where("carrier_entity_types.name = ?", "Shipper Only").first
  SELECT "carrier_profiles".* FROM "carrier_profiles" INNER JOIN "carrier_entity_types" ON "carrier_entity_types"."id" = "carrier_profiles"."entity_type_id" WHERE (carrier_entity_types.name = 'Shipper Only') LIMIT 1
=> #<Carrier::Profile id: ... >