Sleeping X390 discoverable on Bluetooth???

I've recently discovered that my X390 is discoverable on Bluetooth while
it's in S3 sleep.  I have two questions:

1. What the heck?

2. How do I turn this off?

(I'm pretty sure if there had been an obvious switch -- like wake on
bluetooth -- in the UEFI setup, I'd've seen it and turned it off.)

Regards,
Marius Gedminas
-- 
99 little bugs in the code,
99 bugs in the code,
fix one bug, compile it again...
101 little bugs in the code....

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