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CallbackHandler.on_chain_start does not pass trace_name to propagate_attributes, causing non-deterministic trace names on LangGraph resume

Status: Open.

#1602 In langfuse/langfuse-python;

· Edison-A-N opened on Apr 1, 2026

bug: propagate_attributes drops non-string metadata instead of coercing (breaks LangGraph integration)

Status: Open.

#1571 In langfuse/langfuse-python;

· nicoyoung opened on Mar 20, 2026

Support wrapt 2.x

Status: Open.

#1561 In langfuse/langfuse-python;

· rafalh opened on Mar 10, 2026

on_tool_error, on_retriever_error, and on_llm_error missing CONTROL_FLOW_EXCEPTION_TYPES check in Langchain callback handler

integration-langchain

sdk-python

🐞❔ unconfirmed bug

Status: Open.

#1515 In langfuse/langfuse-python;

· vishnumishra opened on Feb 9, 2026

All Langfuse Issues are in langfuse/langfuse

Status: Open.

#91 In langfuse/langfuse-python;

· marcklingen opened on Sep 15, 2023