Streaming API not filtering my very specific hashtag



I have implemented the Twitter streaming API into my Java application using Twitter4j for a university dissertation project.

Previously (a few weeks ago) I was able to repeatedly retrieve Tweets I posted from my account through the Streaming API using a location filter, recently this has stopped showing any Tweets I send (but still retrieves other recent Tweets from within the location bounding box I have specified).

I understand that the Streaming API will return 1% of the firehose therefore I decided to test the retrieval of my Tweets by tracking a specific hashtag ‘#buneetkcl’ and still my application does not appear to retrieve any tweets.

Does anyone happen to know what is going on here?