Could not receive data from client: Connection reset by peer

My Production system:
FAST API + TORTOISE ORM + AWS AURORA POSTGRES + GUNICORN(UVICORN WORKER)
This error message is very frequent in our db logs. There is nothing in logs in server side and as far No connection drops too on server side But this error log in db side is worrying. Same system but with actual postgres and very less load does not show this error on db side at all.

My code Snippet

@app.on_event("startup")
async def init():
    
    await Tortoise.init(
        db_url="postgres://postgres:"
        + str(PASSWORD)
        + "@"
        + str(HOST)
        + ":"
        + str(PORT)
        + "/"
        + str(DATABASE),
        modules={'models': ["__main__"],
        
        }
    )
    await Tortoise.generate_schemas()

@app.on_event("shutdown")
async def shutdown_event():
    await Tortoise.close_connections()

We start the project using supervisor with command
command=/home/ubuntu/env/bin/gunicorn -w 7 -k uvicorn.workers.UvicornWorker main:app

We have neither configured any setting in project nor db other than default.
This Project is REST API microservice of bigger system where other microservices are using Django orm.
Other Django microservice does not raise the same issue as mentioned.

As I am new to Tortoise orm , so pardon me for any silly mistake in my code or my bug report.
Any Help or Guide to solve this issue will be helpful.

Start with the FastAPI startup and shutdown handlers that call Tortoise.init, Tortoise.generate_schemas, and Tortoise.close_connections, then review the Gunicorn command using seven Uvicorn workers. Compare the Aurora PostgreSQL database logs with the application and supervisor logs under load. Done means identifying a reproducible cause for the connection resets and documenting a verified configuration or code change.