Adding addition middleware in FastAPI with FastAPIInstrumentor is creating a strange span.

I have added a simple middleware in FastAPI and this has created a strange span, which you can see in the image.

I have used the following middleware.

@app.middleware("http")
async def hello(request: Request, call_next):
    resp = await call_next(request)
    return resp

How can I create middleware that will not create a new span? Or at least without warning clock skew adjustment disabled; not applying calculated delta of -5.163065ms ?

https://github.com/open-telemetry/opentelemetry-python-contrib/blob/60fb936b7e5371b3e5587074906c49fb873cbd76/instrumentation/opentelemetry-instrumentation-fastapi/src/opentelemetry/instrumentation/fastapi/__init__.py#L198

Start at instrumentation/opentelemetry-instrumentation-fastapi/src/opentelemetry/instrumentation/fastapi/init.py around line 198, then reproduce the reported middleware in a minimal FastAPI application. Compare the generated spans and clock-skew warning with and without the middleware; completion requires identifying whether the behavior is an instrumentation bug or documenting the supported way to avoid it.