It did actually. In some parts. Old shows/movies still works with WVstream, this one works totally different.
Works exactly like you would had a 300Eur capping card. In the same way for : Netflix, Amazon and Hulu.

So the soft will save a .raw file and an ac3 audio which can be played or encoded on a small file.
The quality will be exactly the same.
But to answer your original question yes, it's based on a different widevine bug. It has more than 5 months time in which both netflix and hulu got cracked so I guess will not be patched or they would have done by now.