Power state after power failure not working as intended on MSI boards

[miczyg1]

Component

Dasharo firmware

Device

MSI Pro Z690-A, MSI Pro Z790-P

Dasharo version

v1.1.2 and newer

Dasharo Tools Suite version

None

Brief summary

The power state after power failure setting is sometimes ignored.

How reproducible

Varies

How to reproduce

1. Unplug the AC.
2. Plug the AC after 5 seconds.
3. Observe the board powers on even if "power state off after power failure" is set

Expected behavior

The board respects the power state after power failure setting

Actual behavior

The board does not behave according to the power state after power failure setting

Screenshots

No response

Additional context

Something about the Nuvoton SIO is making it break. It is especially visible when PS/2 is connected.
Investigate the following:
https://github.com/Dasharo/coreboot/blob/dasharo/src/superio/nuvoton/nct6687d/superio.c#L32
https://github.com/Dasharo/coreboot/blob/dasharo/src/mainboard/msi/ms7d25/smihandler.c#L26

Solutions you've tried

No response