PSU Control automatic Power on at boot?

Hi everybody !
I need some information about the PSU plugin.
There ist an option to atomatic switch it on at power on /boot .
If I boot the system it will not switch the switch on. If I click it manually everything is doing fine as expected.

I tried so many settings but I'm not able to get it working .
I expected, to switch on the power supply, the raspi will boot octoprint and then it will switch on the relay and start the printer.

Any suggestions ?