Filter out cookie banner JS errors from Sentry

config/initializers/sentry.rb

@@ -5,6 +5,12 @@
   "NetworkError when attempting to fetch resource.",
 ].freeze
 
+def cookie_banner_js_event?(event, hint)
+  hint[:exception].is_a?(Error) &&
+    tags[:mechanism] == "onunhandledrejection" &&
+    event.exception.values.any? { |ex| ex.value.include?("[object Response]") }
+end
+
 def filterable_js_event?(event, hint)
   hint[:exception].is_a?(TypeError) && event.exception.values.any? do |exception|
     FILTERABLE_JS_ERRORS.include?(exception.value)
@@ -19,7 +25,7 @@ def filterable_js_event?(event, hint)
 
   filter = ActiveSupport::ParameterFilter.new(Rails.application.config.filter_parameters)
   config.before_send = lambda do |event, hint|
-    return nil if filterable_js_event?(event, hint)
+    return nil if filterable_js_event?(event, hint) || cookie_banner_js_event?(event, hint)
 
     # use Rails' parameter filter to sanitize the event
     filter.filter(event.to_hash)