When using the Engineer Drone, if I drive through a supply box I can collect it the first time but it doesn't disappear and the share effect (from drone) isn't triggered. That supply box will remain there in the game, but no-one can collect it. I've watched them try. Doesn't matter what map, or tank variation I use. The worst part is despite the drone making things worse by preventing the collection of supply boxes, it still uses batteries per normal. I think I've worked out what was causing the issue. I had show your drone switched off in settings.