Evaluation UI does not render if there is more than one folder in the project

[danicat]

If you have a project with two or more folders, ADK web starts in an empty state and you need to choose which agent to work on using the agent selector. If you click on an agent and then go to the eval tab, the eval tab will be empty. If you refresh the page and re-select the eval tab, the UI render normally.

It doesn't matter if the extra folders are agents or just project folders.

To Reproduce

mkdir adk-ui-test && cd adk-ui-test
uv init
uv add google-adk google-adk[eval]
uv run adk create hello
uv run adk create goodbye
uv run adk web

Access the web UI, select an agent and click on the Eval tab. It will be empty. Hit refresh and click on the Eval tab again - the missing UI components will appear.

Expected behavior The Eval UI components should appear always if the selected folder is an agent.

Screenshots

Before refresh:

After refresh:

Desktop (please complete the following information):

• OS: macOS
• Python version(python -V): 3.12
• ADK version(pip show google-adk): 1.18

Model Information:

• Are you using LiteLLM: No
• Which model is being used(e.g. gemini-2.5-pro): gemini-2.5-flash

Additional context N/A

[rcleveng]

I just ran into this as well.

[llalitkumarrr]

Hello @danicat ,

Thank you for raising this issue, we tried to reproduce this with latest version and observed the same issue.

Hello @wyf7107 Could you please have a look at this and share your inputs? I have also attached some screen shots for reference.