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openclaw - 💡(How to fix) Fix [Bug]: Native image: dropped after sanitization regression on 2026.5.12 with Ollama/Gemma4 (Telegram)

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Native image dropped after sanitization when sending Telegram photo to Ollama/Gemma4 vision model

Root Cause

Native image dropped after sanitization when sending Telegram photo to Ollama/Gemma4 vision model

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Bug type

Regression (worked before, now fails)

Beta release blocker

No

Summary

Native image dropped after sanitization when sending Telegram photo to Ollama/Gemma4 vision model

Steps to reproduce

  1. Configure OpenClaw with Ollama provider and Gemma4 (vision-capable)
  2. Set input: ["text", "image"] in model config
  3. Connect Telegram bot via OpenClaw gateway
  4. Send a photo (or file/document) via Telegram to the bot
  5. Check logs

Expected behavior

Image is passed natively to Gemma4 via Ollama /api/chat with images[] field. Log should show: "Skipping image understanding: primary model supports vision natively"

Actual behavior

Log shows: Inbound message ... (direct, image/jpeg, 13 chars) Native image: dropped 1 image(s) after sanitization (prompt:images)

Bot falls back to Google web search instead of analyzing the image. Related to closed issue #79750 (same symptom, different provider — Gemini vs Ollama).

OpenClaw version

2026.5.12

Operating system

macOS 26.5

Install method

No response

Model

ollama/gemma4 (8B Q4_K_M)

Provider / routing chain

Telegram → OpenClaw Gateway → Ollama (local, loopback)

Additional provider/model setup details

No response

Logs, screenshots, and evidence

Impact and severity

No response

Additional information

No response

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FAQ

Expected behavior

Image is passed natively to Gemma4 via Ollama /api/chat with images[] field. Log should show: "Skipping image understanding: primary model supports vision natively"

#api#orchestration issue#cache issue#memory leak#API versioning

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openclaw - 💡(How to fix) Fix [Bug]: Native image: dropped after sanitization regression on 2026.5.12 with Ollama/Gemma4 (Telegram)