m2 macbook air shutting down without warning

I just bought the new M2 Macbook Air and it's been shutting down without warning even though the battery indicates that there's at least 20% left. I don't receive any warning that the battery is low. The screen flickers and then turns black. When I charge the laptop and turn it back on, there is a weird glitch in the centre of the screen that doesn't go away unless I restart the laptop.