@dimitrios-kanellopoulos Yes, I know. Wrist HR does turn off when belt is found, but still the watch first searches for wrist OHR. The small heart symbol on the watch has a tiny ābeltā when it is belt HR.
I started turning OHR off after a run, where the first kilometer had crazy HR values. Could be from belt, but also from wrist. I turn off the wrist HR to be sure that the HR the watch uses is from the belt, not OHR, without having to look for that almost too little belt on that small heart symbol.
And I go to excercise options anyway. Indoors the backlight on, and when running, change intensity zones to pace. Half a sec clicking and wrist HR is also off.