I have used the Zendesk SDK to retrieve user data from the text editor, and it works well. However, when I use Agent Copilot, the ticket change events suddenly stop functioning. I have implemented an event to capture any changes in the ticket editor. I have also attached a video to help you understand the issue better.

Would you be able to send through an example of your implementation of the ticket change event? And if you can let me know roughly the last time you encountered the problem, I can check our logs for any further info.
I'm not aware of any bugs that would cause the issue that you're seeing but based off your code and the logs, I'll be able to do further troubleshooting in more detail.
Thanks,
Tipene