When you enter the Modern User Experience / Interface (UX/UI), one of the pages is generating two different responses for two different users. The different responses are impacting your ability to perform a load and performance test on the merged / Modern UI. Why is the response different?
This is due to an issue with the custom automation script
Release : 15.9.2
Component : Clarity MUX UI Usability
Custom automation scripts are not supported, so you will need to work with your automation script developer to fix the script.