Await dont work in BackgroundTaks (Fastapi, Beanie, MongoDB)

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Example Code

from beanie import PydanticObjectId, Document
from fastapi import FastAPI, APIRouter, Request, BackgroundTasks
from time import time
from pydantic import BaseModel
from typing import Optional

app = FastAPI()
#router = APIRouter(prefix="/audit",tags=['Audit'])

class Audit(Document):
    account: Optional[str]
    company: Optional[str]
    user: Optional[str]
    module: str
    endpoint: str
    url_params: Optional[str]
    body_params: Optional[dict]
    reference_id: Optional[str]
    previous_state: Optional[bytes]
    posterior_state: Optional[bytes]
    date: int = time()

    class Settings:
        name = "audit"

async def review_audits() -> List[Audit]:
       audits = await Audit.find().limit(4).sort([("date", -1),]).to_list()
       print(audits)

@app.get("/query/", response_description="get audits to the database")
async def get_filter_audits(request: Request, background_tasks: BackgroundTasks) -> List[Audit]:
        desc = "We are working on it, you will be notified"
        reviews = {"hash":"12345678"}
        
        background_tasks.add_task(review_audits)
        
        return reviews

Description

when you call de endpoint return the result {“hash”:“12345678”} but the background task dont print the result founded on mongodb. I realized that the error occurs with version 0.85.0 but it works fine with version 0.78.0

Operating System

macOS

Operating System Details

No response

FastAPI Version

0.85.0

Python Version

3.10.9

Additional Context

No response

[vanishingESCkey]

@leaguidi if you use BaseHTTPMiddleware in your project then it may affect your BackgroundTasks, take a look at issues mentioned in https://github.com/encode/starlette/pull/1715#issue-1289392289

[thomasleveil]

@leaguidi @vanishingESCkey a fix for https://github.com/encode/starlette/pull/1715#issue-1289392289 has been released in https://github.com/encode/starlette/releases/tag/0.21.0

Watch PR #5471