LazyAssociation#object should not reevaluate reflection values

CHANGELOG.md

@@ -8,6 +8,7 @@ Features:
 
 Fixes:
 
+- [#2307](https://github.com/rails-api/active_model_serializers/pull/2307) Falsey attribute values should not be reevaluated.
 
 Misc:
 

lib/active_model/serializer/lazy_association.rb

@@ -11,7 +11,8 @@ module ActiveModel
       end
 
       def object
-        @object ||= reflection.value(
+        return @object if defined?(@object)
+        @object = reflection.value(
           association_options.fetch(:parent_serializer),
           association_options.fetch(:include_slice)
         )