A couple of times (won’t do it a third!), I’ve come to check a print and to wake the screen from timing out, have pressed the centre button instead of a direction button and the ‘cursor’ has been on the stop print icon, causing the print to cancel. An extra “are you sure” step would be welcomed.
When the screen is off pressing the center button wakes it up and does not cause printing to stop for me. I believe that any button wakes the screen and it not acted on. I have never used any other button but the center button to wake the screen.
Is it possible that you pressed it twice, or held it down?