Hc05 Bluetooth Restore to default automatically

[binu_ji]

Hi
i am using HC05 Bluetooth module in one of my product and its running inside the fishing boat.
Its a GPS module with HC-05 module. i am using a 5V usb adapter and using B0505S-1WR3 Mornsun 5V to 5V DC-DC Converter for further power isolation.
I renamed the module to my product name before shipping

The module works fine and some of them compliant the module renames to HC-05 automatically, that is its Restored to default value.
Dont know how it happens, any body have any possible way to prevent it.

Binu