SigNoz is an open-source APM. It helps developers monitor their applications & troubleshoot problems, an open-source alternative to DataDog, NewRelic, etc.

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Screenshot from 2023-09-19 08-11-55.png

I've finally found it, it's this:
We're using FastAPI and the uvicorn process should be started without the `--reload` option.

First found it in the SigNoz docs.. and the problem isn't even in SigNoz. <https://signoz.io/docs/instrumentation/fastapi/>
After looking closer, also found it in the Opentelemetry docs:
<https://opentelemetry.io/docs/instrumentation/python/automatic/example/#instrumentation-while-debugging>