i use agFM Startup menu (USER SLACK GRUB2 THEME), set mymenu=1, set timeout=10, set default=1.
Real boot from agFM to UEFI:
if I select another iso during the 10 seconds that elapses, the switch window appears and the PC is frozen.
I have tested with 2 USB flash drives. The error is caused by the file \boot\grubfm\rules\iso\e2b.sh. The last working e2b.sh is from 28.02.2020. I have tested several times. Do you have any ideas.
Subject agFM startup menu