The take down lever on my new Shield 1.0 rotates loosely when the slide is removed. I sent it to the factory to be fixed, and they returned it with the note "no repair required". I sent them a video to verify the note.
https://imgur.com/a/RPMM7wW
S&W Customer Support replied that this is considered normal. I'm surprised, but glad to be reassured that it is operating properly.