Has anyone had their tool load monitoring table zero when they power down the machine for the night?

We called Fanuc and they claimed that was not a battery related issue, because the program memory and tool coordinates would have then been lost also. They said Doosan tool load monitoring was not a fanuc product so we would have to talk to Doosan. We called Doosan, they said they didn't know and told us to try Ellison. We've made initial contact with a couple field guys who were not sure what would cause that and we've put in a service request. For now, our lead guy is going to be setting up load monitoring every morning, and inputting manually all tool load monitoring edits. That of course is a waste of time and money. Production up time is going to take a hit.