I had a bad NVME drive that caused that on two separate computers.

One of them I slowly replaced every single piece of hardware except the NVME, still crashed about once a day. Finally sucked it up and bought a new drive and magically everything stopped crashing.

Started happening on my server so I just immdietely replaced the NVME drive and magically no crashes anymore.

Zero issues in the logs, no failures on bootup, no issues with any hardware scanners, just hard freeze randomly.