Poweroff command does reset automatically after ~30 seconds

[Dat Tran]

Our board is using STM32MP15 and doesn't use PMIC, when we try poweroff command, it seems to work but after around 30 seconds, the board reset automatically.

During this time, I see power consumption just goes down a little bit.

Does anyone have same issue or something like this?

[Dat Tran]

Seems Watch Dogs cause this issue.