Currently we do not support assignee and candidate data import from Tasklist in C8 but this is not obvious in our docs: https://docs.camunda.io/optimize/components/userguide/process-analysis/report-analysis/define-reports/#user-task-reports

To avoid confusion it would be nice to add a C7 only label or note to this page.

Testing Notes:

Check that the docs contain a note clarifying this behaviour. The specific change can be seen on the PR: https://github.com/camunda/camunda-platform-docs/pull/2179