我一直在仔细研究他们的JIRA问题，发现

I've been digging a bit through their JIRA issues and found JIRA ISSUE. I've reverted the MongoDB.Driver MongoDB.Driver.Core and MongoDB.Bson to a version 2.3.0 and it work like a fine tuned watch, so it seems to be the problem with the Mongo package itself.

我已经使用不同版本的软件包对其进行了测试，并且此问题在2.4.0版本中引入.所有以前的版本都运行良好.

I've tested it with the different versions of the package and the issue is introduced in the version 2.4.0. All the previous versions work well.