default_scope is interfering with uniqueness validation in mongoid

default_scope_uniqueness.rb

class Country
  include Mongoid::Document
  field :country_code, type: String
  field :status, type: String, default: "review"
  validates_uniqueness_of :country_code
  default_scope where(status: "published")
end

c1 = Country.create!(country_code: "CA", status: "published")
c2 = Country.new(country_code: "CA")

# c2.errors will produce uniqueness validation as intended because c1.status == "published"

c1.update_attribute(:status, "review")

c3 = Country.new(country_code: "CA")
# c3.errors will not include uniqueness validation because c1 is not found during uniqueness validation 
# since default scope is included during validation and c1.status == "review"