Charging mode boots into regular OS

[unrooted]

I'm having a small, but notable issue with my Pixel 8 Pro, if I turn off USB-C via Security tab in Settings, turn off the phone and plug it into charger, the phone powers on automatically (even tho changes in the settings should allow charging only when turned off, which makes me a little bit confused)

Is it normal? Maybe it's related to some battery settings?

I'm running latest stable.