How are you accessing K3? If it is through Moonshot's API, then there is very likely guardrails, because it seems like it wanted to answer and was then cutoff.

We are starting to get access to K3 from US providers now, curious if they exhibit the same response pattern?

this was kimi 'instant' on kimi.com through their chat, looking now it's probably not k3 but still one of their models nonetheless