For my primary usage, suggesting topics and ideas based on what I've written and read, hallucinations are harmless -- if zenfetch suggests a silly or baseless idea, I just ignore it look at the other nine. So yes, but it doesn't really matter for me.

We do use the standard hallucination checks to make sure the final generated answer is rooted in the retrieved context.

It is an ongoing effort to ensure truly factual answers and this is one of our top priorities :)