My 830 has been working pretty much flawlessly for some time. Strange issue has occurred on last 2 rides where a ridiculously high auto ftp update has flashed up on screen at end of ride, together with a new 20 min power record of 1200w or something that daft. I have 3s and lap av power on main screen and nothing looks off during ride, and nothing looks off in the file upload. Anyone else seen this or offer suggestions? On current 9.73 FW.