I had an odd experience this morning with my Edge 830.
After a short stop to regroup and have a chat, we set off and after resuming my Edge 830 was showing zero speed periodically rising to 0.1kph and kept pausing and resuming. Satellite reception was shown as perfect and other sensors continued working fine. I sent the Edge to sleep, but when awakened it still read zero speed. I then turned the Edge off and on again, and the speed returned to normal.
Has anyone else experienced zero speed issues?