I am experiencing a very similar issue to the one stated in this discussion: https://dev.twitter.com/discussions/20841
I know that thread is kind of old, and ended without much conclusion, so I wanted to open another.
I am using node to connect to the public statuses/filter endpoint. I am using Twit to manage the connection. I opened an issue in their repo with more details if that helps: https://github.com/ttezel/twit/issues/117