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feat(sdk): support multiple OTLP span exporters (dual-write alongside Langfuse)

feat-otel

integration-otel

integration-python-decorator

sdk-python

Status: Open.

#1716 In langfuse/langfuse-python;

· loveRhythm1990 opened on Jun 18, 2026

fix(langchain): handle Anthropic cache_creation nested-dict in usage — causes silent generation drop on v2.x, data loss on v4.x

bugSomething isn't workingSomething isn't working

feat-llm-cost-tracking

integration-langchain

integrations

sdk-python

🐞❔ unconfirmed bug

Status: Open.

#1697 In langfuse/langfuse-python;

· ASAD-BE18 opened on Jun 10, 2026

Suppress "Placeholders have not been resolved" warning when MessagesPlaceholder use is intentional (LangChain integration)

bugSomething isn't workingSomething isn't working

integration-langchain

integrations

sdk-python

🐞❔ unconfirmed bug

Status: Open.

#1667 In langfuse/langfuse-python;

· 2093686099 opened on May 22, 2026

[Bug]: Incomplete traces and missing cost when using LiteLLM langfuse_otel callback with asyncio.gather()

integration-litellm

sdk-python

🐞❔ unconfirmed bug

Status: Open.

#1640 In langfuse/langfuse-python;

· shuttlesworthNEO opened on Apr 24, 2026

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

integration-langchain

sdk-python

🐞❔ unconfirmed bug

Status: Open.

#1602 In langfuse/langfuse-python;

· Edison-A-N opened on Apr 1, 2026

All Langfuse Issues are in langfuse/langfuse

Status: Open.

#91 In langfuse/langfuse-python;

· marcklingen opened on Sep 15, 2023