when i think about this, i gave up and busy with other thing
then, when i going to sleep, i remember my old laptop with linux installed and 2gb swap
then i grow swap to 4gb then it display "waiting for /dev/disk/by-uuid/…’’ then it time out and boot normally
i don’t know how AEM work (all my computer and laptop are corebooted) but if you somehow set timeout to that hanging task, maybe it will work