I got 2TB sn850X and using it with Z690 Strix-A.
I haven't yet noticed idle reboot problems, but on every reboot this new driver generates system log error 11: "The driver detected a controller error on \Device\RaidPort2."
I managed to trace that this device is indeed sn850x.
Are other sn850x users getting such an error?
My problems basically ended when I turned off A.I.Overclocking, with the exception being that I had to turn off A.I.Overclocking.
So my sn850x seems to be fine, which is great, and now I can install the second one I have.
Sorry, can't be more help than that. GL.