diff --git a/app/listeners/action_cable_listener.rb b/app/listeners/action_cable_listener.rb
index 109f6d344..48b7a3aa9 100644
--- a/app/listeners/action_cable_listener.rb
+++ b/app/listeners/action_cable_listener.rb
@@ -14,11 +14,19 @@ class ActionCableListener < BaseListener
   end
 
   def notification_deleted(event)
-    return if event.data[:notification].user.blank?
+    notification_data = event.data[:notification_data]
 
-    notification, account, unread_count, count = extract_notification_and_account(event)
-    tokens = [event.data[:notification].user.pubsub_token]
-    broadcast(account, tokens, NOTIFICATION_DELETED, { notification: { id: notification.id }, unread_count: unread_count, count: count })
+    user = User.find_by(id: notification_data[:user_id])
+    account = Account.find_by(id: notification_data[:account_id])
+    return if user.blank? || account.blank?
+
+    notification_finder = NotificationFinder.new(user, account)
+    tokens = [user.pubsub_token]
+    broadcast(account, tokens, NOTIFICATION_DELETED, {
+                notification: { id: notification_data[:id] },
+                unread_count: notification_finder.unread_count,
+                count: notification_finder.count
+              })
   end
 
   def account_cache_invalidated(event)
diff --git a/app/models/notification.rb b/app/models/notification.rb
index db07e3679..806eabdf1 100644
--- a/app/models/notification.rb
+++ b/app/models/notification.rb
@@ -180,7 +180,17 @@ class Notification < ApplicationRecord
   end
 
   def dispatch_destroy_event
-    Rails.configuration.dispatcher.dispatch(NOTIFICATION_DELETED, Time.zone.now, notification: self)
+    # Pass serialized data instead of ActiveRecord object to avoid DeserializationError
+    # when the async EventDispatcherJob runs after the notification has been deleted
+    Rails.configuration.dispatcher.dispatch(
+      NOTIFICATION_DELETED,
+      Time.zone.now,
+      notification_data: {
+        id: id,
+        user_id: user_id,
+        account_id: account_id
+      }
+    )
   end
 
   def set_last_activity_at
diff --git a/enterprise/app/services/captain/llm/paginated_faq_generator_service.rb b/enterprise/app/services/captain/llm/paginated_faq_generator_service.rb
index 149152107..93957a7f3 100644
--- a/enterprise/app/services/captain/llm/paginated_faq_generator_service.rb
+++ b/enterprise/app/services/captain/llm/paginated_faq_generator_service.rb
@@ -19,7 +19,7 @@ class Captain::Llm::PaginatedFaqGeneratorService < Llm::LegacyBaseOpenAiService
   end
 
   def generate
-    raise CustomExceptions::PdfFaqGenerationError, I18n.t('captain.documents.missing_openai_file_id') if @document&.openai_file_id.blank?
+    raise CustomExceptions::Pdf::FaqGenerationError, I18n.t('captain.documents.missing_openai_file_id') if @document&.openai_file_id.blank?
 
     generate_paginated_faqs
   end
diff --git a/enterprise/app/services/captain/llm/pdf_processing_service.rb b/enterprise/app/services/captain/llm/pdf_processing_service.rb
index 82e3e9fbc..ac35a2848 100644
--- a/enterprise/app/services/captain/llm/pdf_processing_service.rb
+++ b/enterprise/app/services/captain/llm/pdf_processing_service.rb
@@ -10,7 +10,7 @@ class Captain::Llm::PdfProcessingService < Llm::LegacyBaseOpenAiService
     return if document.openai_file_id.present?
 
     file_id = upload_pdf_to_openai
-    raise CustomExceptions::PdfUploadError, I18n.t('captain.documents.pdf_upload_failed') if file_id.blank?
+    raise CustomExceptions::Pdf::UploadError, I18n.t('captain.documents.pdf_upload_failed') if file_id.blank?
 
     document.store_openai_file_id(file_id)
   end
diff --git a/lib/custom_exceptions/pdf.rb b/lib/custom_exceptions/pdf.rb
new file mode 100644
index 000000000..e6dfa7c41
--- /dev/null
+++ b/lib/custom_exceptions/pdf.rb
@@ -0,0 +1,19 @@
+module CustomExceptions::Pdf
+  class UploadError < CustomExceptions::Base
+    def initialize(message = 'PDF upload failed')
+      super(message)
+    end
+  end
+
+  class ValidationError < CustomExceptions::Base
+    def initialize(message = 'PDF validation failed')
+      super(message)
+    end
+  end
+
+  class FaqGenerationError < CustomExceptions::Base
+    def initialize(message = 'PDF FAQ generation failed')
+      super(message)
+    end
+  end
+end
diff --git a/lib/custom_exceptions/pdf_processing_error.rb b/lib/custom_exceptions/pdf_processing_error.rb
deleted file mode 100644
index 2c81f95d8..000000000
--- a/lib/custom_exceptions/pdf_processing_error.rb
+++ /dev/null
@@ -1,25 +0,0 @@
-module CustomExceptions
-  class PdfProcessingError < Base
-    def initialize(message = 'PDF processing failed')
-      super(message)
-    end
-  end
-
-  class PdfUploadError < PdfProcessingError
-    def initialize(message = 'PDF upload failed')
-      super(message)
-    end
-  end
-
-  class PdfValidationError < PdfProcessingError
-    def initialize(message = 'PDF validation failed')
-      super(message)
-    end
-  end
-
-  class PdfFaqGenerationError < PdfProcessingError
-    def initialize(message = 'PDF FAQ generation failed')
-      super(message)
-    end
-  end
-end
diff --git a/spec/enterprise/services/captain/llm/paginated_faq_generator_service_spec.rb b/spec/enterprise/services/captain/llm/paginated_faq_generator_service_spec.rb
index 5215a2d40..ca4518435 100644
--- a/spec/enterprise/services/captain/llm/paginated_faq_generator_service_spec.rb
+++ b/spec/enterprise/services/captain/llm/paginated_faq_generator_service_spec.rb
@@ -1,5 +1,4 @@
 require 'rails_helper'
-require 'custom_exceptions/pdf_processing_error'
 
 RSpec.describe Captain::Llm::PaginatedFaqGeneratorService do
   let(:document) { create(:captain_document) }
@@ -23,7 +22,7 @@ RSpec.describe Captain::Llm::PaginatedFaqGeneratorService do
       end
 
       it 'raises an error' do
-        expect { service.generate }.to raise_error(CustomExceptions::PdfFaqGenerationError)
+        expect { service.generate }.to raise_error(CustomExceptions::Pdf::FaqGenerationError)
       end
     end
 
diff --git a/spec/enterprise/services/captain/llm/pdf_processing_service_spec.rb b/spec/enterprise/services/captain/llm/pdf_processing_service_spec.rb
index fd519dcdd..7e9ec9a40 100644
--- a/spec/enterprise/services/captain/llm/pdf_processing_service_spec.rb
+++ b/spec/enterprise/services/captain/llm/pdf_processing_service_spec.rb
@@ -1,5 +1,4 @@
 require 'rails_helper'
-require 'custom_exceptions/pdf_processing_error'
 
 RSpec.describe Captain::Llm::PdfProcessingService do
   let(:document) { create(:captain_document) }
@@ -52,7 +51,7 @@ RSpec.describe Captain::Llm::PdfProcessingService do
       it 'raises error when upload fails' do
         allow(mock_client.files).to receive(:upload).and_return({ 'id' => nil })
 
-        expect { service.process }.to raise_error(CustomExceptions::PdfUploadError)
+        expect { service.process }.to raise_error(CustomExceptions::Pdf::UploadError)
       end
     end
   end
diff --git a/spec/listeners/action_cable_listener_spec.rb b/spec/listeners/action_cable_listener_spec.rb
index 55b74116c..61f818da1 100644
--- a/spec/listeners/action_cable_listener_spec.rb
+++ b/spec/listeners/action_cable_listener_spec.rb
@@ -132,7 +132,14 @@ describe ActionCableListener do
   describe '#notification_deleted' do
     let(:event_name) { :'notification.deleted' }
     let!(:notification) { create(:notification, account: account, user: agent) }
-    let!(:event) { Events::Base.new(event_name, Time.zone.now, notification: notification) }
+    let(:notification_data) do
+      {
+        id: notification.id,
+        user_id: agent.id,
+        account_id: account.id
+      }
+    end
+    let!(:event) { Events::Base.new(event_name, Time.zone.now, notification_data: notification_data) }
 
     it 'sends message to account admins, inbox agents' do
       expect(ActionCableBroadcastJob).to receive(:perform_later).with(