We are using the streaming api to monitor tweets that mention the user we are authorised as, and take action based on a subset of them. However, while this appears to be working for most tweets, it appears to be that we are not seeing any tweets from one particular user.
Eg, if the user we are authenticated as is a, when user b tweets ‘hello @a’ we see this tweet, but not when user c tweets ‘hello @a’.
There appears to be no difference between user c and user b. In particular, they don’t have their tweets private, and neither follow or are followed by user a.
We are using the url https://userstream.twitter.com/1.1/user.json with a post, and the option track=a (the user we are authenticated as). There does not appear to be any other error occurring.