diff --git a/config/initializers/backtrace_cleaning.rb b/config/initializers/backtrace_cleaning.rb
index 340f9da..dee9506 100644
--- a/config/initializers/backtrace_cleaning.rb
+++ b/config/initializers/backtrace_cleaning.rb
@@ -1,2 +1,3 @@
 bc = Rails.backtrace_cleaner
-bc.add_silencer { |line| %r{^lib/(monkey_patches|semantic)}.match?(line) }
+# bc.add_silencer { |line| %r{^lib/(monkey_patches|semantic)}.match?(line) }
+bc.add_silencer { |line| %r{^lib/(monkey_patches)}.match?(line) }
diff --git a/config/initializers/instrumentalizing.rb b/config/initializers/instrumentalizing.rb
index 1b4b058..b7baf66 100644
--- a/config/initializers/instrumentalizing.rb
+++ b/config/initializers/instrumentalizing.rb
@@ -1,11 +1,5 @@
 return unless Rails.application.server?
 
-if Rails.env.development?
-  RailsSemanticLogger::Rack::Logger.logger.level = :info # useful for remaining log like "[Rack::Log] Started..."
-  SemanticLogger.clear_appenders!
-  Rails.logger.name = 'rails'
-end
-
 def build_instrumentation_config
   {
     action_controller: true,
@@ -17,6 +11,12 @@ def build_instrumentation_config
 end
 
 Rails.configuration.after_initialize do
+  if Rails.env.development?
+    RailsSemanticLogger::Rack::Logger.logger.level = :info # useful for remaining log like "[Rack::Log] Started..."
+    SemanticLogger.clear_appenders!
+    Rails.logger.name = 'rails'
+  end
+
   ActiveSupport::Notifications.subscribe('rolling.live_constant') do |event|
     constants = event.payload[:changes].map { |change| change[:constant] }
     if constants.intersection(%w[ACTIVE_RECORD ACTION_VIEW]).any?
diff --git a/lib/semantic/instrumentalizer.rb b/lib/semantic/instrumentalizer.rb
index 2ba3e91..2bbb853 100644
--- a/lib/semantic/instrumentalizer.rb
+++ b/lib/semantic/instrumentalizer.rb
@@ -40,6 +40,8 @@ module Semantic
           subscriber = ActiveSupport::Notifications.subscribe("#{hook}.#{event_group}") do |event|
             # logger.debug("SEND #{log_subscriber} hook=#{hook}")
             log_subscriber.send(hook, event)
+          rescue StandardError => e
+            logger.error('Error during instrumentation handling', e)
           end
           global_subscribers << subscriber
         end
@@ -49,7 +51,7 @@ module Semantic
         classname = event_group.to_s.camelize
         case classname
         when 'ActionController'
-          Semantic::Subscribers.const_get(classname).new('toto1')
+          Semantic::Subscribers.const_get(classname).new('toto1') # FIXME: externalize session_key
         else
           Semantic::Subscribers.const_get(classname).new
         end
diff --git a/lib/semantic/subscribers/action_controller.rb b/lib/semantic/subscribers/action_controller.rb
index 2e47ff0..e5c230b 100644
--- a/lib/semantic/subscribers/action_controller.rb
+++ b/lib/semantic/subscribers/action_controller.rb
@@ -72,12 +72,10 @@ module Semantic
           dimensions = case status_family
                        when 2
                          Semantic::FancyDimensions.new(rails: TERMINUS_STRING)
-                       when 3
+                       when 3, 5
                          Semantic::FancyDimensions.new(rails: '╙║╜')
                        when 4
                          Semantic::FancyDimensions.new(rails: '╙╨╜')
-                       when 5
-                         Semantic::FancyDimensions.new(rails: '╙║╜')
                        end
           logger.info("Completed #{colorize(status, BOLD)} #{Rack::Utils::HTTP_STATUS_CODES[status]}", dimensions:)
           logger.info(' ', dimensions: Semantic::FancyDimensions.new(rails: ' ║ ')) if status_family == 3
diff --git a/lib/semantic/subscribers/active_record.rb b/lib/semantic/subscribers/active_record.rb
index 273aa19..cfb3e03 100644
--- a/lib/semantic/subscribers/active_record.rb
+++ b/lib/semantic/subscribers/active_record.rb
@@ -18,15 +18,24 @@ module Semantic
         logger.debug("#{name} #{sql}")
       end
 
-      def instantiation(event)
-        # class_name = event.payload[:class_name]
-        # record_count = event.payload[:record_count]
-        # logger.debug("instantiate #{class_name} #{record_count} times")
+      def start_transaction(event)
+        short_uuid = short_uuid(event.payload[:transaction].uuid)
+        logger.info("TRANSACTION Begin #{short_uuid}")
       end
 
+      def transaction(event)
+        outcome = event.payload[:outcome]
+        short_uuid = short_uuid(event.payload[:transaction].uuid)
+        logger.info("TRANSACTION #{outcome.capitalize} #{short_uuid}")
+      end
+
+      def instantiation(event); end
+
       def strict_loading_violation(event) = any_hook event
-      def start_transaction(event) = any_hook event
-      def transaction(event) = any_hook event
+
+      private
+
+      def short_uuid(uuid) = uuid.split('-').first
     end
   end
 end