We've determined that the issue is related to the Samsung hard drive firmware.
- More specifically, the issue is with the UEFI partition and the Dell Block I/O driver, and not with DE.
- When DE writes to the disk cache, it sends a command to flush the data on the disk. The Dell firmware reports that it has been successful, even when it has failed to flush the cache.
- It's a UEFI specification requirement to report correctly that the flush has been successful.
So, if you type a password and receive the message that it's incorrect, DE requests that the data be written to the disk. The firmware fails to complete this task, even though it reports that it has. As a result, the preboot File System (PBFS) becomes corrupted. This problem is compounded if you perform a hard reset (turn off).