diff --git a/app/models/chargeback_container_image.rb b/app/models/chargeback_container_image.rb
index b1bec73c755..4662bf9e9dd 100644
--- a/app/models/chargeback_container_image.rb
+++ b/app/models/chargeback_container_image.rb
@@ -55,6 +55,8 @@ def self.build_results_for_report_ChargebackContainerImage(options)
     @unknown_project ||= OpenStruct.new(:id => 0, :name => _('Unknown Project'), :ems_ref => _('Unknown'))
     @unknown_image ||= OpenStruct.new(:id => 0, :full_name => _('Unknown Image'))
     build_results_for_report_chargeback(options)
+  ensure
+    @data_index = @containers = nil
   end
 
   def self.default_key(metric_rollup_record, ts_key)
diff --git a/app/models/chargeback_container_project.rb b/app/models/chargeback_container_project.rb
index eb6a3da90d1..5683ad2b144 100644
--- a/app/models/chargeback_container_project.rb
+++ b/app/models/chargeback_container_project.rb
@@ -50,6 +50,8 @@ def self.build_results_for_report_ChargebackContainerProject(options)
     return [[]] if @projects.empty?
 
     build_results_for_report_chargeback(options)
+  ensure
+    @projects = nil
   end
 
   def self.where_clause(records, _options)