Motorhome parked in garden (France), yesterday walked out the door to notice that the Oyster dish was halfway up. Blamed each other and closed it. I needed to move the MH this morning, all ok. Just gone outside and the dish is halfway up again. The control unit is turned off so logically it can't do what it's doing. I've closed it down again and started the engine, reversed up and down, parked up, control unit off. I've told Casper to bark if he sees it going up again. Any thoughts please.