Ah.
Aaaah…
In my extensive post on SSD power consumption, I noticed that WD drives have two “low power” state – one when the computer is in S4 and the other for when it is in S3 (and perhaps other sleep states) – and only WD drive have this info on the datasheet.
My thinking is that the Crucial, like Samsung and many others, do not have the modern sleep state support (or the old sleep state support) WD drives possesses, and thus when Linux tried to perhaps sleep the device it would … well, cause troubles.
My next drive is going to be a WD. Noted!
Does your current installment (with WD) have any other issues? I don’t think so as NVMe is pretty generic a protocol. Compared to the “modern sleep”/“low power idle” madness.