uponthenose

Anyone else having an issue with Rover's disappearing? I saw there was a long dead post from 2016 about this but it's happening again and not just once in a while. It happens to all unmanned rovers. I can't seem to find any rhyme or reason as to when they vanish but it happens relatively quickly, usually with 15 minutes of me stop using it. I've left them with brakes on and with the wheels put in so I know they aren't rolling off. Any thoughts?