diff --git a/app/components/activities/item_component.rb b/app/components/activities/item_component.rb
index 1906dfdf3d5..384144cc114 100644
--- a/app/components/activities/item_component.rb
+++ b/app/components/activities/item_component.rb
@@ -41,7 +41,7 @@ class Activities::ItemComponent < ViewComponent::Base
   end
 
   def project_suffix
-    return if project_activity?
+    return if activity?(Project)
     return if activity_is_from_current_project?
 
     kind = activity_is_from_subproject? ? 'subproject' : 'project'
@@ -60,42 +60,31 @@ class Activities::ItemComponent < ViewComponent::Base
   end
 
   def rendered_details
-    @rendered_details ||=
-      @event.journal
-        .details
-        .filter_map { |detail| @event.journal.render_detail(detail, activity_page: @activity_page) }
+    filter_details.filter_map { |detail| @event.journal.render_detail(detail, activity_page: @activity_page) }
   end
 
   def comment
-    return unless work_package_activity?
+    return unless activity?(WorkPackage)
 
     @event.event_description
   end
 
   def description
-    return if work_package_activity?
+    return if activity?(WorkPackage) || activity?(TimeEntry)
 
     @event.event_description
   end
 
   def time_entry_url
-    return unless time_entry_activity?
+    return unless activity?(TimeEntry)
 
     @event.event_url
   end
 
   private
 
-  def work_package_activity?
-    @event.journal.journable_type == 'WorkPackage'
-  end
-
-  def project_activity?
-    @event.journal.journable_type == 'Project'
-  end
-
-  def time_entry_activity?
-    @event.journal.journable_type == 'TimeEntry'
+  def activity?(type)
+    @event.journal.journable_type == type.to_s
   end
 
   def activity_is_from_current_project?
@@ -105,4 +94,20 @@ class Activities::ItemComponent < ViewComponent::Base
   def activity_is_from_subproject?
     @current_project && (@event.project != @current_project)
   end
+
+  def filter_details
+    details = @event.journal.details
+
+    details.delete(:user_id) if details[:logged_by_id] == details[:user_id]
+    delete_detail(details, :work_package_id)
+    delete_detail(details, :comments)
+    delete_detail(details, :activity_id)
+    delete_detail(details, :spent_on)
+
+    details
+  end
+
+  def delete_detail(details, field)
+    details.delete(field) if details[field] && details[field].first.nil?
+  end
 end
diff --git a/modules/costs/app/models/time_entry.rb b/modules/costs/app/models/time_entry.rb
index ef0b33b9016..47949bd9854 100644
--- a/modules/costs/app/models/time_entry.rb
+++ b/modules/costs/app/models/time_entry.rb
@@ -58,8 +58,11 @@ class TimeEntry < ApplicationRecord
   before_save :update_costs
 
   register_journal_formatted_fields(:time_entry_hours, 'hours')
-  register_journal_formatted_fields(:named_association, 'work_package_id')
   register_journal_formatted_fields(:time_entry_named_association, 'user_id')
+  register_journal_formatted_fields(:named_association, 'work_package_id')
+  register_journal_formatted_fields(:named_association, 'activity_id')
+  register_journal_formatted_fields(:plaintext, 'comments')
+  register_journal_formatted_fields(:plaintext, 'spent_on')
 
   def self.update_all(updates, conditions = nil, options = {})
     # instead of a update_all, perform an individual update during work_package#move