I have the 6th gen X1, but still using Windows, and still its behavior bugs me a little bit -- I almost never really shut down my laptop (does anyone?) -- I simply close and open the lid. Annoyingly, the X1 still wants to persistently be connected to my Airpods via bluetooth. So lid close doesn't actually put it on sleep suspend, it's some other weird middle suspend mode which is not really suspended at all.
That's S0i3 for you.