I’m running a MongoDB server using Docker. The data is being saved initially, but after some time, it gets lost even though a volume is attached. Docker has not been restarted during this period. Any ideas on what might be causing this?

I am using FastAPI for my backend and Motor to configure MongoDB. My code does not include any commands to delete data. Here is a relevant code snippet:

import motor.motor_asyncio
import os

class MongoDBClient:
def init(self):
URI = “mongodb://localhost:27017”
# Create a MotorClient
self.client = motor.motor_asyncio.AsyncIOMotorClient(URI)
# Access the specific database
self.db = self.client[mongodb_config[‘db’]]

async def get_collection(self, collection_name):
    return self.db[collection_name]

I expected the data to persist, but it seems to disappear after some time, even though no delete operations are being performed.