Jittery animiation when streaming to chat_interface.chatbot_value

[brycepg]

Describe the bug

Have you searched existing issues? 🔎

• I have searched and found no existing issues

Reproduction

async def chat_fn_hidden_input(history: list[dict] = [], input_graph_state: dict = {}, uuid: Optional[UUID] = None, prompt: str = "", goal = "", user_input: str = ""):
    async for item in chat_fn(user_input, history, input_graph_state, uuid, prompt, goal):
        message, state, state2 = item
        yield (history + [{"role": "assistant", "content": message}]), state, state2

        start_button.click(show_chatbot, inputs=[], outputs=[chatbot], js=SHOW_CHATINTERFACE).then(
            fn=chat_fn_hidden_input,
            inputs=[
                chatbot,
                current_langgraph_state,
                current_uuid_state,
                prompt_textbox,
                goal_textbox,
            ],
            outputs=[
                chat_interface.chatbot_value,
                current_langgraph_state,
                end_of_assistant_response_state
            ],
        ).then(show_button, outputs=[build_prompt_button]).then(
            hide_button, outputs=[start_button]
        )

A more complete example is available upon request

Screenshot

No response

Logs

System Info

Gradio Environment Information:
------------------------------
Operating System: Windows
gradio version: 5.16.0
gradio_client version: 1.7.0

------------------------------------------------
gradio dependencies in your environment:

aiofiles: 23.2.1
anyio: 4.8.0
audioop-lts: 0.2.1
fastapi: 0.115.8
ffmpy: 0.5.0
gradio-client==1.7.0 is not installed.
httpx: 0.28.1
huggingface-hub: 0.28.1
jinja2: 3.1.5
markupsafe: 2.1.5
numpy: 2.2.3
orjson: 3.10.15
packaging: 24.2
pandas: 2.2.3
pillow: 11.1.0
pydantic: 2.10.6
pydub: 0.25.1
python-multipart: 0.0.20
pyyaml: 6.0.2
ruff: 0.9.6
safehttpx: 0.1.6
semantic-version: 2.10.0
starlette: 0.45.3
tomlkit: 0.13.2
typer: 0.15.1
typing-extensions: 4.12.2
urllib3: 2.3.0
uvicorn: 0.34.0
authlib; extra == 'oauth' is not installed.
itsdangerous; extra == 'oauth' is not installed.


gradio_client dependencies in your environment:

fsspec: 2025.2.0
httpx: 0.28.1
huggingface-hub: 0.28.1
packaging: 24.2
typing-extensions: 4.12.2
websockets: 14.2

Severity

I can work around it

[abidlabs]

Hi @brycepg can you provide a complete minimal repro that we can use to reproduce the issue above? See: https://stackoverflow.com/help/minimal-reproducible-example