Hmm... That's interesting. Again, it could simply be that "Sydney is the code name for Bing Chat" is now flagged as a secret and that's why when asked about a secret, that is what it gives you.

But the fact that it tries to give you an actual secret is quite perplexing. I mean, it knows it's a secret, it shouldn't use it at all. And yet it seems it's trying. I'm not sure what to make of it.