This error has the same effect of CSHARP-2067.

To reproduce it just try to run mongo test for library https://github.com/ProximoSrl/NStore to make tests run I needed to disable parallelism with

[assembly: CollectionBehavior(DisableTestParallelization = true)]

If you execute tests in parallel, all tests failes due to timeout in connection, if you execute them sequentially or one by one everything is ok, so I suspect that there is some deadlock in how the driver connect to the server.