F5 battery - Runaway process

F5/14.20

I usually see a battery drain of 0.3%/h (14days autonomy). Yesterday drain suddenly increased to 1%/h, for no apparent reason. Turning off connectivity didn't improve drain. Turning the watch off/on resumed drain to its usual level.

If this happens again, I'll try turning off hr. 

If there's a tool to monitor active processes, if there's such a thing, please let me know