Anyone encountering this?
It happened to me a couple of times while showering in warm water.
I guess the sudden change in pressure or temperature affecting the sensors?
I guess maybe the pressure reading and then your general movement was similar to climbing stairs? I know it's not just the pressure change that indicates a stair/floor, otherwise it would pick those up while in an elevator.
My hands movement certainly don't resemble like I am climbing.
Probably another explanation is the HR. My HR tends to spike up during the shower.