System password not being retained

Hello Everyone,

I just wanted to throw this out and see if anyone has seen this before. I have a rb2011uas-2hnd. I recently updated the firmware from 3.02 to 3.10 then to 3.12. Running OS version 6.9. since the firmware update my routerboard continually loses the system password. I can set it it will stay for about 5 minutes and then its gone and I have to login using no password. I can make it loses password by rebooting system. This is the only way I can manually replicate error. Any ideas would be greatly apprecited. Makes no differance if I set password via winbox or terminal.