Root Cause
The issue was likely caused by an active A/B test that altered nearby elements, affecting the expected structure of the website's code. This, combined with faulty cache management, led to inconsistent delivery of content to users, causing intermittent errors.
Resolution
The resolution involved clearing the cache and pausing the experiment. Additionally, the tool causing the issue was completely removed for the time being.
Action Plan
Currently, the team is working with technical experts to understand and correct the behavior. There is also a plan to thoroughly review the tool to prevent future conflicts.