As far as I can tell it was solved for me a quite some time ago (on my A485), most probably a by a Bios update (with previously employed kernel updates), and I have not encountered it E459 with newer Ryzen at all.
I have never encountered it on Windows.
My thinking is that it was a combination of kernel behaviour with some in early BIOSes and was fixed when both were updated.
If you use Desktop and you have latest BIOS I would suggest replacing the motherboard as somebody pointed above.
As far as I can tell it was solved for me a quite some time ago (on my A485), most probably a by a Bios update (with previously employed kernel updates), and I have not encountered it E459 with newer Ryzen at all.
I have never encountered it on Windows.
My thinking is that it was a combination of kernel behaviour with some in early BIOSes and was fixed when both were updated.
If you use Desktop and you have latest BIOS I would suggest replacing the motherboard as somebody pointed above.