I have MongoDB running in Docker for Windows on my local machine. The configuration from my compose file is:

mongo:
  image: mongo:latest
  ports:
    - "27017:27017"

At the moment i am building an import process with ASP.NET Core where I have to import about 1.1 Mio documents. I realized that the import process just stops after about 400k items. When I break the process I a task from the network layer (NetworkStream.WriteAsync) but no busy or waiting thread at all. MongoDB is still alive, I can connect with MongoChef and also run queries.

I import the document in batches of 5.000 items:

var requests = 
    this.transformedHotels.Select(x => 
        new ReplaceOneModel<MongoTransformedHotel>(Builders<MongoTransformedHotel>.Filter.Eq(y => y.Id, x.Id), x)
        {
            IsUpsert =  true
        });

return this.collection.BulkWriteAsync(requests);

When I run MongoDB without docker it works. What can cause my network connection to hang?