Steps to Reproduce

1. Create a Middleware to log the request body like https://stackoverflow.com/questions/70134618/why-does-fastapi-hang-when-adding-a-middleware-to-print-the-http-request-body
2. The previous step works before configuring the Sentry SDK
3. Configure the Sentry as defined in https://docs.sentry.io/platforms/python/guides/fastapi/
4. When try to access to the test URL, the application hangs because the request body was already accessed by the Sentry integration

Expected Result

Simplified middleware example

@app.middleware("http")
async def logging_middleware(request: Request, call_next):
    start_time = time.time()
    body = await request.body()
    print(body)
    response = await call_next(request)`
    return response

Actual Result

When the Sentry implementation is active, the body = await request.body() line hangs and never response.

Additional Info

This answer has more information related to the problem https://stackoverflow.com/a/71811390/11030205