Bug type

Behavior bug (incorrect output/state without crash)

Beta release blocker

No

Summary

Quite often, I get multiple "[object Object]" in answers.

Steps to reproduce

1. use OpenClaw 2026.4.22 (00bd2cf)
2. Setup model Mistral small or large (perhaps happen with other models) without thinking
3. Prompt for tool usage

Expected behavior

Clean answers

Actual behavior

Example of answer :

[object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object][object Object]---
📂 État du Vault Obsidian "Work"...

OpenClaw version

2026.4.22

Operating system

Macos

Install method

nom

Model

Mistral Small -> Mistral Large -> Gemma4

Provider / routing chain

Local

Additional provider/model setup details

No response

Logs, screenshots, and evidence

Impact and severity

Affected : users channels
Severity : Block as [object Object] contaminates dreams and memory.
Frequency : between always and very often depending on prompts
Consequence : extra cost, memory corruption

Additional information

No response