Shut down Debian system doesn't work when using ATX PSU

I used a SFX ATX PSU to power Orion O6 board and installed Debian 12 (Radxa version), and inserted a Radeon RX 550 GPU in PCIe slot, the RX 550 GPU worked well.
BUT I found an issue, after I shuting down the system, I found that the fan on the O6 board was still running, and the fan on RX 550 was also still running, that means the PSU was still working and was not turned off.

@Radxa FAEs,
Please help to resolve the issue, thanks!

Attached images show the FANs on O6 and RX 550 are still running after shut down Debian system.


We are aware of this and you have the same issue as mentioned here. We are currently in talk with CIX for a solution.

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