I use Fit to monitor my cycling performance. But lately it has started behaving weird. I cycle for a good 6-7km but the log shows like 0.25km. Once it became so crazy that it squeezed my 7-8km biking into like 4 minutes and showed me a top speed of 78km/h. One thing to note, I had paused the workout in the middle, so the cause may be pausing the thing.