Twitter Api friendships/create Limits

According to Twitter's developers documentation, the limit for friendships/create endpoint is 1000 per app per 24 hours. Yet I am getting a 161 Error Code: "You are unable to follow more people at this time" after 400 requests. So I believe I am hitting a smaller rolling limit. Does anyone know about these undocumented short-term limits?

Note: I am aware that the limit per user is 400 per 24hours, but that's not the case for me. Every call is from a different user.

In my experience the documentation is wrong. Maybe in theory you can do that, but you definitely hit limits before the stated limits.