Powers On automatically everytime its Powered Off.

I power Off the watch when I don't plan to use it for a few days. However, the watch keeps powering back On after a number of minutes when lying untouched. This didn't always happen and only started happening in the last few months.

How do I stop the device from automatically powering On when not in use?

Note: There is no force acting of the device (apart from resting on a flat surface), so this is not a case of unintended powering On by accidentally pressing the buttons.