diff --git a/packages/plugin-web-attribution-browser/src/helpers.ts b/packages/plugin-web-attribution-browser/src/helpers.ts
index 92173a368..6832dab3e 100644
--- a/packages/plugin-web-attribution-browser/src/helpers.ts
+++ b/packages/plugin-web-attribution-browser/src/helpers.ts
@@ -17,13 +17,14 @@ const domainWithoutSubdomain = (domain: string) => {
   return parts.slice(parts.length - 2, parts.length).join('.');
 };
 
+//Direct traffic mean no external referral, no UTMs, no click-ids, and no other customer identified marketing campaign url params.
 const isDirectTraffic = (current: Campaign) => {
   const { referrer, referring_domain, ...currentCampaign } = current;
-  Object.keys(currentCampaign).forEach(
-    (key) => (currentCampaign[key] === undefined || currentCampaign[key] === '') && delete currentCampaign[key],
+  const currentCampaignWithValue = Object.keys(currentCampaign).filter(
+    (key) => currentCampaign[key] === undefined || currentCampaign[key] === '',
   );
 
-  return !referrer && Object.keys(currentCampaign).length === 0;
+  return !referrer && Object.keys(currentCampaignWithValue).length === 0;
 };
 
 export const isNewCampaign = (
@@ -40,7 +41,6 @@ export const isNewCampaign = (
   }
 
   //In the same session, direct traffic should not override or unset any persisting query params
-  //Direct traffic mean no external referral, no UTMs, no click-ids, and no other customer identified marketing campaign url params.
   if (!isNewSession && isDirectTraffic(current) && previous) {
     return false;
   }