I have been having these exact issues with my EQ14
I own two of these devices so I have tried a combination of swapping RAM and disks between machines and I have observed the following.
The EQ14 with the original M.2 SATA disk does not experience these shutdowns, and if it does, it is extremely rare and maybe after a couple of months. My other EQ14 which originally had 2 x NVMe running in ZFS would randomly crash so I experimented by having one disk at a time in each slot. From what I can see, the crashes are happening much quicker if only the x4 slot above the wi-fi card is occupied versus the x1 slot.
It does seem to me that there is a design flaw somewhere. The only real stable solution is to use an M.2 SATA. This is not something I would expect from such a product that advertises two M.2 slots that should be capable of handling an NVMe card. Perhaps @Beelink can look into this for us and maybe provide a BIOS patch
