I usually fly the drone around my house and the connection will be fine but when I fly slightly higher the video feed in the goggles will become very choppy and pixelated although I did not even go very far. Another problem is that whenever I try to land, the drone will almost always become unstable and fly backwards while landing and hit everything in its path which forces me to always use the emergency propeller stop function. I calibrated the imu 4 times and tightened the propellers but both issues still remain. So right now my drone is having problems with connection and landing stability. What could the a possible problem and what can I do to fix it?

I usually fly the drone around my house and the connection will be fine but when I fly slightly higher the video feed in the goggles will become very choppy and pixelated although I did not even go very far. Another problem is that whenever I try to land, the drone will almost always become unstable and fly backwards while landing and hit everything in its path which forces me to always use the emergency propeller stop function. I calibrated the imu 4 times and tightened the propellers but both issues still remain. So right now my drone is having problems with connection and landing stability. What could the a possible problem and what can I do to fix it?