Hi,
You're not alone, this is one of the current limitations many people run into with multi-agent orchestration in the new Copilot Studio experience.
When a parent agent delegates a request to a connected agent, the connected agent may use its own knowledge sources internally, but the citations are not always propagated back to the parent agent for display. As a result, the parent agent can return a well-formed answer without exposing the underlying citations that the connected agent used.
A few things to verify:
Make sure each connected agent is configured to return answers from its knowledge sources rather than generating responses without retrieval.
Test each connected agent independently to confirm that citations appear when it's called directly.
If citations appear in the standalone agent but disappear only when invoked through the orchestrator, it's likely a platform limitation rather than a configuration issue.
Since you've already confirmed this works in the classic experience, your configuration is probably correct. The difference is likely in how the new orchestration pipeline handles responses from connected agents.
For now, if displaying citations is a hard requirement for your users, you may need to continue using the classic experience for this scenario until citation propagation is supported in the new orchestration experience.
I'm interested to hear if anyone has found a reliable workaround, as this would be valuable for enterprise scenarios where source attribution is essential.