Recently I have noticed the connect power curve for individual rides does not reflect the power info collected from my Garmin head unit. For example, the other day I hit the lap button and averaged 246 watts for 48 minutes (within a 127 minute ride) however the the power curve for the ride shows.
20min = 247watts
30min = 232watts
60min = 216watts
120min = 197watts
The overall ride of 127mins displays an average of 214watts recorded with a 4iiii power meter and an Edge 510 unit.