The fact it reproduce code verbatim, including comments and even swear words means it is definitely copying some of the time. Does it copy all the time? Doesn'

The fact it reproduce code verbatim, including comments and even swear words means it is definitely copying some of the time. Does it copy all the time? Doesn't matter. Plagiarism is plagiarism even regardless of it is done by a student in school, an author, a monkey or an "AI". You wouldn't accept this from a student, you shouldn't accept it from a coworker (unless you are releasing under a compatible license) and of course you should accept it from Microsoft.