@Purple Yeah, sounds familiar sadly. One day one of my colleagues can write perfect high quality code and the next day I am looking at a PR and the WTF/min is incredibly high and I know what happened... When confronted in the way if "I am not really sure why you wrote it like this, normally you have a very different style" they admit they used AI that day cause they were lazy...
And it's often very obviously weird stuff... Like for example we always program Python with typing and suddenly there is no typing anywhere to be found. Recently I even got a PR where >everything< was done using getattr meta-programming instead of typed property access and that >should< be something you almost never need to use and wonder when reading even once.
I really like my colleagues and normally they can make wonderful stuff, but when things like this happen... I don't know, they just given up or something? 