CCR1016-12G filesystem issue

Hello, fellow mikrotik users.
I’ve encountered a strange behaviour of ccr1016.
It periodically erases user account data leaving only admin/blank.
It’s filesystem seems to switch to RO. I cannot write anything there like certificates or backup my configuration using ‘export file’ command.
First i thought it was hacked and i attempted a fresh start with netinstall, but the following day it happened again.
Any suggestions? or maybe my unit is faulty and have to be replaced by a seller?
thanks in advance!