Raspberry Pi OS shutdown results in a reboot even with shutdown -H

I’ve installed Raspberry Pi OS 64bit on my AML-S905X-CC and it runs my Docker apps really well. But when I use “sudo shutdown -H” from the command line to shutdown the Pi, the system goes to a Halt state for about a minute and then reboots. Any suggestions?

Just tried “sudo shutdown -P”. Does the same thing except it reboots a little sooner than with -H.

sudo shutdown -H now should halt the machine and not reboot it.
sudo shutdown -P now will trigger a reset but since there’s no way to turn the board on again except to plug and unplug power.

If this is not the case, please let us know and we will re-test.