@Marvin I can't see individual task runs of a flow anymore under Tasks Runs tab, neither can I see the flow graph.

The issue you're experiencing with missing task runs and flow graphs in the Prefect UI might be related to known bugs in Prefect 3.x versions. Here are some relevant findings: 1. Task Runs Visibility: There was a reported issue in Prefect 3.0.0rc19 and 3.0.0rc20 where task runs were not being displayed in the dashboard, even though they completed successfully. Downgrading to an earlier version (e.g., 3.0.0rc18) resolved the issue for some users. GitHub Issue 2. Flow Graph Visualization: There are instances where dependency arrows between sub-flows are not displayed correctly, affecting the visualization of flow graphs. This might be due to specific configurations or bugs in the visualization logic. GitHub Issue For both issues, consider the following steps: - Refresh the UI: Sometimes, simply refreshing the UI can help display the latest data. - Check Version: Ensure you are using a stable release of Prefect. If you are on a release candidate version, consider downgrading to a stable release or upgrading to the latest stable version if available. - Documentation: Review the Prefect 3.x documentation for any updates or additional troubleshooting tips. If the problem persists, you might want to report it or check for updates on Prefect's GitHub repository.