Recently, my Mavic Pro started to in standard mode respond slow on takeoff and slightly unstable even though 12 satellites are connected. I have to use the sticks to keep it stable for a few seconds before (it appears) the drone locks into GPS. Speedwise I can only get 10mph. However, everything is good in sport mode --- take off and speed. I already recalibrated the compass and IMU to no avail. Also tried turning off avoidance sensors, making sure not in beginners mode, etc. I've been flying this drone for almost two years in California / Hawaii with no problems until now. Did anyone had this similar issue and possibly a fix? I hate to send this bird to DJI, especially if it could be just a simple fix that I may have overlooked? Thanks!