One of the devices dropped offline, you should run a scrub to bring it up to date, corruption errors are normal in this case for every synced block, you can re-set them when done.
Make sure system share is set to COW, old default was NOCOW, and that cannot be corrected.
The below might help with the dropping device.
On the main GUI page click on the flash drive, scroll down to "Syslinux Configuration", make sure it's set to "menu view" (top right) and add this to your default boot option, after "append initrd=/bzroot"
nvme_core.default_ps_max_latency_us=0 pcie_aspm=off
e.g.:
append initrd=/bzroot nvme_core.default_ps_max_latency_us=0 pcie_aspm=off
Reboot and see if it helps.