---
title: "Campaign Studio - December 16, 2021"
date: "2025-09-12T05:57:24+00:00"
summary: "Campaign Studio update: Improved CDP connector, extended CSRF tokens, and fixes for segments, landing pages, and dynamic emails."
image:
type: "announcement"
url: "/campaign-studio/release/2021-12-16/79001-campaign-studio-december-16-2021"
id: "e2326a46-3d06-4647-b479-e16030449411"
---

*   Change Scale improvements are made to the CDP connector to support higher volumes of email event data.
    
*   Change The expiration time for CSRF tokens is extended from 2 hours to 12 hours. Users will see fewer CSRF token errors.
    
*   Fix Visitors (anonymous contacts) were added to segments, impacting instance performance.
    
*   Fix Landing page redirects with trailing spaces resulted in 404 errors.
    
*   Fix Users were not able to modify dynamic email content with multiple options for select filters.
    
*   Fix Dynamic email content was not properly applied when multiple options were selected for filters using Select - Multiple field types.
    
*   Fix Emails and previews were getting corrupted after cloning.
    
*   Fix Field changes in Campaign Studio were not purged for plugins that only sync data from an integration to Campaign Studio.