Mikrotik Back To Default Username And Password [CCR 1036]

Hello Folks,

i had face a problem.My mikrotik back to default username and password. This problem begin on 10 november. In 11 november i upgrade the ROS to last LTS version. based on check there are no strange log on mikrotik. Today on 24 november this problem come again. My mikrotik suddenly back to default username and password in several times. Is anybody had facing the same problem on ccr ?. Please give your advice

What about the other config of the router? Is it also reset to default or just the username/pass?

The other router is running normal, this problem only on my ccr 1036. Is it possible to input the script to our mikrotik ?. Is there another way to check the mikrotik like mikrotik kernel. I also check files on my mikrotik and there are no hiding files.

Did you reuse the same PW?
Is the device Konfigurieren able direct from the Internet?

We dont using username like “admin”.After user back to default, i create new username.To remote our mikrotik need vpn first. I check system restore and no bad block. When i remote winbox and login mikrotik for several hours the mikrotik didn’t back to default. The user will back to default if the no one login into mikrotik.