Personally i’m out of ideas for now…
Return that command, perhaps it will help those who’ll come here to help you as well:
sudo dmidecode -t memory
@anon31687413 maybe there was something funky you recall in Kernel, about this fairly new CPU (Intel Core i7-1065G7) / soldered RAM?
Also usual suspect would be Kingston nvme, that is very bad manufacturer, see this and that…
That could be very well a reason, given how random sometimes those failures are, but i don’t think it’s that this time, at least yet. Because if it was - drive would be most likely already dead and you wouldn’t be able to boot.