Watch going into power save mode after finishing an activity (video showing bug)

Hi

This has actually been going on for several weeks or even months (certainly since 15.71b) and still with most up to date firmware.

My watch is set to 10pm-730AM power saving sleep mode. I occasionally toggle battery saving on manually if I don't think I'll be doing much on a particular day. I do not do anything odd or unusual with the watch otherwise.

I have actually managed to capture this today with a video!

(note some of the top right button presses are just finger trouble, not reproduction steps)

1drv.ms/.../s!AlVHIini1UNht2LguymcdoPEOodc