Sure,
this is the kwmobile case I ordered. It mentions the auto sleep feature, it does have magnets inside, I checked them with a fridge magnet, also if I fold it to the back it holds the cover there, though I cannot determine if they are in the exactly right spot, but it looks like they are.
By the way I checked the hardware, it says BD71828, so it's the second revision. Maybe the new revisions don't work with 3rd party cases anymore, but that's just my assumption.
Forgot to mention that for some reason my Libra 2 is missing 3 default fonts: Caecilia, Gill Sans and Malabar. Not a tragedy, just I used to them being there, I'm using the Metropolis font anyway.