The bootloader component loader.efi sometimes crashes and crashes and forces the computer to reboot, other times it just feezes and does nothing and other times it loads the kernel normally. The issue only appeared after upgrading from 10.2 to 10.3. It worked perfectly under version 10.2 and 10.1.
Created attachment 173894 [details]
Must have been introduced in the r294981 MFC, which is the only change to EFI in stable/10 between 10.2 and 10.3 timeframe.