'where' query incorrectly works for belongs_to relations with custom primary_key

class Company

  include Mongoid::Document

  field :legacy_id, type: Integer

  has_many :products, inverse_of: :company, primary_key: 'legacy_id', foreign_key: 'company_legacy_id'

end

class Product

  include Mongoid::Document

  field :legacy_id, type: Integer

  field :company_legacy_id, type: Integer

  belongs_to :company, inverse_of: :products, primary_key: 'legacy_id', foreign_key: 'company_legacy_id'

end

c = Company.create!(legacy_id: 3)

# => #<Company _id: 60069b5158af1454d9ae1818, legacy_id: 3>

p = Product.create!(legacy_id: 5, company: c)

# => #<Product _id: 60069b6658af1454d9ae1819, legacy_id: 5, company_legacy_id: 3>

Product.where(company: c)

# => #<Mongoid::Criteria

#  selector: {"company_legacy_id"=>BSON::ObjectId('60069b5158af1454d9ae1818')}

#  options:  {}

#  class:    Product

#  embedded: false>