hello joolzgnux82,
we had fix the Nano APP partition cloning issue, which correct the failure of reading partition data from the the target device.
could you please upgrade to l4t-r32.3.1, please download the attachment, and overwrite below binary for verification.
$OUT/Linux_for_Tegra/bootloader/nvtboot_recovery.bin
thanks
devtalk1064479_r32.3.1_nvtboot_recovery.tar.gz (82.6 KB)