Extra agentic icon appears in ADK Web UI only when using Gemini 3 Pro with Token Streaming enabled

[akajammythakkar]

Describe the bug

When the interface is running with Gemini 3 Pro, an extra “agentic” icon appears in the chat UI but only when Token Streaming is enabled.
If Token Streaming is off, the issue does not occur.
This behavior is not seen when using Gemini 2.5 Pro, regardless of streaming state.
This is a visual/UI inconsistency, but it may confuse users.

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To Reproduce

Steps to reproduce the behavior:

1. Run ADK Web with Gemini 3 Pro model selected.
2. Enable Token Streaming.
3. Start any conversation.
4. Observe that an extra agentic icon appears in the chat area.

Additional checks:

• Gemini 3 Pro + Token Streaming OFF → issue does not appear.
• Gemini 2.5 Pro (Streaming ON/OFF) → issue does not appear.

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Expected behavior

Only a single agent icon should be visible during a model response.

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Screenshots

Gemini 3 Pro (issue present):

• gemini3_streaming_on.png
• gemini3_streaming_on_1.png
• gemini3_streaming_on_2.png
• gemini3_streaming_on_new_session.png

Gemini 3 pro (no issue present)

• gemini3_streaming_off.png

Gemini 2.5 Pro (no issue):

• gemini2.5_streaming_on.png
• gemini2.5_streaming_off.png

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Desktop (please complete the following information):

• OS: macOS
• Python version: 3.10.19
• ADK version: 1.18.0

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Model Information:

• Using LiteLLM: No

• Model(s):

  • Issue: Gemini 3 Pro
  • No issue: Gemini 2.5 Pro

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Additional context

This issue occurs only when Token Streaming = ON for Gemini 3 Pro in the ADK web UI.
No functional impact, but creates UI inconsistency.

[akajammythakkar]

HI @wyf7107 , if you need any logs or anything, please let me know, will send it to you.
Thanks!

edit:

Hi @DeanChensj if you need any logs or anything, please let me know, will send it to you.
Thanks!

[wyf7107]

Thanks, let me take a look

[llalitkumarrr]

Hello @akajammythakkar ,

Apologies for the delayed response, kindly upgrade to google-adk==1.23.0 to check if this issue is resolved with latest version or not.

[adk-bot]

This issue has been automatically marked as stale because it has not had recent activity for 7 days after a maintainer requested clarification. It will be closed if no further activity occurs within 7 days.

[adk-bot]

This has been automatically closed because it has been marked as stale for over 7 days.