apt-get update and upgrade fails the Pogoplug V4 (no replies)

Hi everyone,

On my Pogoplug V4, freshly installed

kernel:linux4.18.4-kirkwood-tld-1-bodhi.tar.bz2 (27 Aug 2018)
rootfs: Debian-4.12.1-kirkwood-tld-1-rootfs-bodhi.tar.bz2 (24 Jul 2017)

32GB new flash drive.

I already tested 3-4 times and after every time I perform

#apt-get update
#apt-get upgrade

while the operation goes on successfully without any error, the box doesn't come back online after a reboot. On the front, it showing stable green light but on the gigabit ethernet port, only orange (stable) light is on, no green light.

what could be the reason?

Thanks.