We are having some issues with our Mavic Enterprise. When Landing the aircraft it comes straight down without hovering before landing. We've had one hard land before we realized there was an issue. also when it lands it takes off again unless we hold down the left stick. Other issue that has come up is the aircraft will not hold position. It will start to go up on its own if left in a hover position. We have check all software issues, recalibrated compass, IMU, sticks, gimbal with no success. Has this happened to anyone else, if so any recommendations? Anyone else with any thoughts on this. Thanks