Universal Editor copy/paste components between pages stopped working

Hi Experience League Community,

  We are troubleshooting an issue with AEM Universal Editor in an Edge Delivery Services project.

  The copy/paste functionality for components between pages was working before, but it recently stopped working. Authors can open and edit pages in Universal Editor, but when they try to copy a component from one page and paste it into another page, the paste action does not complete as
  expected.

  We have started reviewing Author logs and browser network traces, but we are not yet sure which area is most relevant to investigate.

  We would appreciate guidance on what else to check, for example:

  1. Universal Editor component definitions, models, or filters
  2. Edge Delivery Services Configuration Service settings
  3. Site/repository/branch configuration
  4. Author permissions or access restrictions
  5. Browser/network requests involved in copy/paste
  6. Known limitations when copying components across pages or language/site branches
  7. Any relevant Author log categories or services to inspect

  Has anyone seen a similar issue where copy/paste between pages stops working even though page editing still works?

  Are there specific endpoints, logs, configuration files, or permissions that should be validated to troubleshoot this behavior?

  Thanks in advance for any guidance.