Issue with latest MongoDB package (0.4) (Meteor)

We have a Meteor app connected fine to our MongoDB instance. We also want to connect Elixir to this same database. This worked fine using 0.2 of this package:

But the problem was that when the primary node in the replica set changed, Elixir couldn’t connect to Mongo anymore. So we upgraded to 0.4 of the package to fix this.

But things no longer work in 0.4 and we get this error:
** (EXIT) time out
(elixir) lib/gen_server.ex:737:
(mongodb) lib/mongo/monitor.ex:71: Mongo.Monitor.check/1
(stdlib) gen_server.erl:601: :gen_server.try_dispatch/4
(stdlib) gen_server.erl:667: :gen_server.handle_msg/5
(stdlib) proc_lib.erl:247: :proc_lib.init_p_do_apply/3

Elixir does works for us if we connect it to other non Meteor related MongoDBs. Any idea how this could be? Could Meteor have any affect on the MongoDB instance or its configuration?

If anyone here has dealt with similar MongoDB / Meteor issues would love if you could shed some light on this problem.