you must update EKS image since you’re using a customize key.
did you replace any keys within example.sh to generate a new eks_t234.img?
for instance, you should keep others as default, such as oem_k1, fv, sym_t234, and only replacing sym2_t234 with your customize key.
after that…
you should also try partition flash only to update EKS partition, A_eks.
due to it’s a sign/encrypted binary file, you should have two steps approaches to create an image by flash.sh, and running l4t_initrd_flash.sh for a partition update.
for example,
(1) Running with flash script to create eks_t234_sigheader.img.encrypt.
$ sudo ./flash.sh --no-flash -r -k A_eks jetson-agx-orin-devkit mmcblk0p1
(2) Copy sign/encrypt binary to… $OUT/Linux_for_Tegra/tools/kernel_flash/images/internal/
(3) Execute below command to update EKS partition for your Orin NX/Nano.
$ sudo ./tools/kernel_flash/l4t_initrd_flash.sh -k A_eks --flash-only --showlogs