Slow loading and performance issues in Content Marketing Platform (CMP)

Update timeline

1. investigating Nov 13, 2026, 04:02 PM UTC

   We are investigating reports that the Optimizely Content Marketing Platform (CMP) is loading slowly or failing to load for some customers. Affected users may see a loading screen that does not finish, or pages that take much longer than usual to open. The issue is intermittent: pages may load, then slow down again when refreshed. Our Engineering team has reproduced the issue and is investigating the cause. We will post an update as soon as we learn more. We apologize for the disruption to your work.

2. investigating Nov 13, 2026, 04:03 PM UTC

   We are continuing to investigate this issue.

3. investigating Nov 13, 2026, 04:29 PM UTC

   We have narrowed down the behavior reported in Optimizely Content Marketing Platform (CMP). Based on our latest findings, CMP is not failing to load. Instead, the first load of the application may take up to approximately 60 seconds to complete, and a loading screen may appear during that time. We recommend allowing the page to finish loading rather than refreshing as a temporary workaround. Our Engineering team is continuing to investigate the cause of the delay and to improve load times. We will share more information as soon as we have them at our disposal. We apologize for any inconvenience caused.

4. identified Nov 13, 2026, 05:34 PM UTC

   We've identified the cause of the slowness. A slowdown in Google Analytics 4 (GA4), which CMP uses for analytics data, delayed the analytics settings that load with CMP. This slowed the homepage and caused timeouts. Only organizations with Google Analytics 4 connected to CMP were affected. Organizations without GA4 connected saw no impact. A fix to limit the impact of GA4 delays has been merged, and we're finishing its rollout and monitoring. We'll post another update once things are back to normal.

5. monitoring Nov 13, 2026, 05:52 PM UTC

   A fix to limit the impact of Google Analytics 4 (GA4) delays on Content Marketing Platform (CMP) has been deployed. CMP no longer waits on GA4 analytics settings before loading, and post-deployment testing, including on affected organizations, shows that load times have returned to expected levels. The workaround shared in our earlier update is no longer needed. If you continue to see slow loading, please clear your browser cache and reload the page. We are continuing to monitor CMP performance closely and will post a final update once we confirm the issue is fully resolved

6. resolved Nov 13, 2026, 06:30 PM UTC

   This incident has been resolved.