Mac Mini Late 2014 and NVME SSD instability

Hi guys,

I have a Mac Mini Late 2014 with a 2,5" SSD I replaced myself. Recently I removed and NVME SSD from a notebook and wanted to add to the Mac Mini as the primary drive. I bought the classic L-shaped adapter and mounted it. At first boot I open Disk Utility and everything is fine, I'm able to format the drive, create volumes and so on...

But after reboot the NVME drive just disappears from Disk Utility, even if I reboot in recovery mode no luck, my disk is gone. If I shutdown and power up again, the book reappears.

Troubleshooting I've already done:

• NVME disk works fine on the notebook
• I've got three NVME adapters of different brands and they have the same behavior
• Tried all sort of diskutil commands, but my NVME drive is never shown

What other things should I check?

Thanks!