tyt 7800

For some reason it will not remember configuration settings. When I turn it off and back on the settings are all the same EXCEPT the offsets. I have to recall each side back from memory. Then it works just fine till I turn it off again. It draws so little in standby I usually just leave it on, but that’s no solution. I even tried to store the current config in (A), but still doesn’t work.
Ideas?