NVMe device is dropping offline:
Jan 9 12:50:22 Unraid kernel: nvme nvme1: Device not ready; aborting reset, CSTS=0x1
Jan 9 12:50:22 Unraid kernel: nvme nvme1: Removing after probe failure status: -19
Jan 9 12:50:53 Unraid kernel: nvme nvme1: Device not ready; aborting reset, CSTS=0x1
Look for a BIOS update, this can also sometimes help, some NVMe devices have issues with power states on Linux, try this, on the main GUI page click on flash, scroll down to "Syslinux Configuration", make sure it's set to "menu view" (on the top right) and add this to your default boot option, after "append" and before "initrd=/bzroot"
nvme_core.default_ps_max_latency_us=0
Reboot and see if it makes a difference.