Azure Prompt Flow Output Trace Not Displaying Expected Details

We are experiencing an issue with the Prompt Flow (UI) trace visualization in Azure AI Studio.

When we run a prompt flow and go to the Outputs > Trace tab, we only see a single flow node with 0 Tokens and the total duration. However, we do not see the detailed breakdown of intermediate nodes or any expanded trace graph (as shown in the https://learn.microsoft.com/en-us/azure/ai-foundry/how-to/flow-develop#understand-the-trace-view).

Expected Behavior:

Upon clicking on the flow node, the right pane should show the detailed flow overview, including duration and token usage across individual steps/nodes.
A full trace graph of the execution should be rendered.

Current Behavior:

Only the top-level flow is visible.
No token information or trace details are available for sub-nodes, even though the flow has multiple components.

Could you please advise whether this is a known issue or if there's any configuration needed to enable the full trace view?