Digi One SP won't remember settings after reboot

Model: Digi One SP
Firmware: Version 82000774_W 10/23/2013
POST: release_82001178_G

If I change password it is valid until reboot. Additionally if I change network settings to static IP and apply changes they won’t be remembered after reboot.
I’ve got this problem only with one device.

Sounds like bad memory/flash. You should contact Digi Tech. Support to pursue repair arrangements.