If you are having issues getting your NVMe drive to work or it is unstable with the Argon NEO 5 NVME case, read this.
First make sure your drive is NOT on this incompatibility list:
https://wiki.geekworm.com/NVMe_SSD_boot_with_the_Raspberry_Pi_5
I had stability issues with both my RPIs with that case when I moved it around or connected/disconnected cables. I was seeing error messages in the console and then the RPI would freeze. I finally found the issue and the workaround and I can now jerk the case around and it keeps running.
The instructions say you should pass the ribbon cable in the slot on the edge of the case. Check if in your case the ribbon cable touches the edge of the slot in a way that it bends it sideways and puts stress on the cable. I solved it by not passing the cable in the slot but passing it along the RPI board directly.
I would like to know if other users had this same issue and solved it with this solution.