Last prompt I tried was "Matte portrait of Yennefer" returned 8/9 blurred images [1]

[1] https://imgur.com/a/nIx8GBR

It appears that they are trying to prevent generating accurate images of a real person, because they are worried about deepfakes, and this produces the blurring. While Yennefer is a fictional character she's played by a real actress on Netflix, so maybe that's what is triggering the filter.

I found it really stupid. It should just tell me it's against their policy, just like ChatGPT.