`demo.load()` hangs indefinitely when `gr.Chatbot `is placed in a row with other components in `gradio>=6.1.0`

[sergey21000]

Describe the bug

When trying to display a gr.Chatbot in the same row as other components using gr.Row() in gradio versions 6.1.0 and above, demo.load() runs indefinitely. This does not happen in gradio<=6.0.2.

You can also reproduce the issue in this Google Colab notebook:
https://colab.research.google.com/drive/14YBzOZVZu-gVIrEPPpGyMGJ1PQNYOlIT

Have you searched existing issues? 🔎

• I have searched and found no existing issues

Reproduction

Minimal reproducible example:

import gradio as gr

with gr.Blocks() as demo:
    with gr.Tab('Tab 1'):
        with gr.Row():
            gr.Chatbot()
            with gr.Column():
                gr.Slider()
                gr.Slider()
                gr.Slider()
                    
    with gr.Tab('Tab 2'):
        textbox = gr.Textbox()

    demo.load(
        fn=lambda: 'some text',
        inputs=None,
        outputs=textbox,
    )

demo.launch()

Workarounds found:

1. Placing the chatbot on its own row works:

with gr.Row():
    gr.Chatbot()
with gr.Column():
    gr.Slider()
    ...

2. Removing the second tab also resolves the issue.

Screenshot

Expected behavior:

---

Actual behavior:

Logs

* Running on local URL:  http://127.0.0.1:7860
* To create a public link, set `share=True` in `launch()`.

System Info

- Gradio version: >=6.1.0 (broken)
- Gradio version: <=6.0.2 (works)
- Python version: 3.12
- OS: Windows/Linux

Severity

I can work around it

[freddyaboulton]

Thank you! We'll take a look