Muddy LR650X

I've got a Muddy LR650X range finder that I've had for less than a year. It's been flawless, until today. Shot my first club 3D shoot today, and the ranges were all over the place. After the shoot, I checked it against the practice range targets and it was dead on. Anybody ever experience this?

I have a muddy 850x. Love it. Haven’t had any issues with yardage differences

Maybe try a new battery?

It's new. I've only got one season on it. It shows the battery is fully charged. I know that doesn't mean a whole lot. I'll give it try.