FP4 - Stuck in fastboot mode - relock the bootloader

fastboot — Debian testing fastboot set active slot --slot SLOT Use SLOT; 'all' for both slots, 'other' for non-current slot --set-active Sets the active slot before fastboot getvar currentslot Open a Command Prompt, Terminal, or Powershell and then type the following command – fastboot --set-active=a or fastboot --set-active=b

fastboot set active slot connect phone to computer, open terminal and type 'fastboot devices' to check if you see your device; change boot slot with 'fastboot --set-active a' or '