---
title: "Mapp Intelligence: Consistent End Device Visitor ID Filtering in Marketing Automation"
slug: "mapp-intelligence-consistent-end-device-visitor-id-filtering"
status: "new"
updated: 2026-09-15T10:24:32Z
published: 2026-09-15T10:24:32Z
canonical: "docs.mapp.com/mapp-intelligence-consistent-end-device-visitor-id-filtering"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mapp.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Mapp Intelligence: Consistent End Device Visitor ID Filtering in Marketing Automation

**9 September 2026** Marketing Automation campaigns can use conditions based on the **End device visitor ID**. In some setups, these conditions did not evaluate consistently. This has been fixed.

## What Is Changing

Conditions based on the **End device visitor ID** now evaluate reliably. Previously, campaigns could be shown to visitors who did not match the condition, or withheld from visitors who did, so campaigns may not have reached the intended visitors. This affected setups using server-side cookies or anonymous tracking.

## Availability

This fix has been live since 9 September 2026. No action is required on your side.

## Related

- [Real-Time Behaviors (Live Data)](/marketing-automation-real-time-behaviours.md)