So the bug could not be reproduced in a number of runs with preseeds having the following late command to disable apparmor
d-i preseed/late_command string in-target sed -i 's/quiet/quiet apparmor=0/' /boot/grub/grub.cfg
So the bug could not be reproduced in a number of runs with preseeds having the following late command to disable apparmor
d-i preseed/ late_command string in-target sed -i 's/quiet/quiet apparmor=0/' /boot/grub/grub.cfg