[BUG]: LLMObs spans no longer grouped into traces #15411
Description
Tracer Version(s)
3.18.1
Python Version(s)
3.11.7
Pip Version(s)
pip 25.3
Bug Report
I am using the LLMObservability plugin and the OpenAI Responses API. AWS lambda functions using the official DD layer.
For some reason, the LLM spans are not being grouped into traces in the UI for LLM Observability, even though if I go to APM I see them grouped into the trace.
In previous ddtrace version, 2.17.0, and the OpenAI completions API, I see the LLM spans correctly grouped into traces.
Reproduction Code
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Error Logs
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Libraries in Use
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Operating System
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