Strange access issue with Pimoroni Pi5 M.2 board

Hi
I am using the NVME board. I can boot from the board but get strange access issues after a few seconds. I have this issue with two NVME SSDs. My current one is a Patriot P310.

When I boot from SD everything looks OK a file system check of the NVME shows no issues. I can run a Benchmark using the Disks app too with no issues too.

I even flashed the OS onto the SSD while booting from the SD with no issues.

OK now the file system dies right after boot from the NVME drive.
I recreated the OS several times and each time the process finishes without issue.

Still when I boot from SD card the drive seems fine. I did a benchmark and it looks fine up to a certain point. I guess it is out of cache.

I did a stress test with larger files from a SD boot now and the SSD connection fails there too. Seems to be a general issue after all.