Every once in a while, my '14 CX5 experiences what the OP experiences. Our gear selectors are the zigzag shift pattern.
I think the issue is that the gear selector does not fully return to the left side of the slot when shifted to P. It is easy to slide the lever up as high as it can go and assume the spring action of the lever will retract the lever all the way to the left. However, after some time, the spring action is not what it used to be and the lever will slowly slide to the left when pushed up to P and the start/stop button is pressed before the lever is fully seated to the left.
The lever needs to be fully seated to the left in the P slot before it recognizes that the shifter is in "park". If it is not, then the electronics will stay on when the start/stop button is pressed.
So when shifting to park, just make sure the lever is fully seated to the left before pressing the start/stop button.