Yea and mostly only when the type cover is open. I had it closed on my desk for 5 hours, occasionally opening to check if it had shut down, no problems. Then I did a test where I left it open after responding to you, shut off in maybe a minute from last
touching it. Replied to my service ticket saying it is still happening, then tested again, same thing, about a minute with the cover open and it shut down. Then I figured I would time it. And it was 48 seconds with the type cover down before the screen went
black, this time I had to hard reboot it.
I thought maybe it was a software glitch related to the "turn screen off after..." setting but mine can be set to 5 min or 5 hours, and it still happens after about a minute of inactivity.
The person helping me said it may be a hardware issue, I would recommend starting a claim so if it is a manufacturing error, you get it moving while still under warranty. This is definitely a real problem.