Daynamica app relies on the GPS signal to detect trips. GPS signal is unavailable underground and on running train. If you ride the Metrorail, you may experience abnormal trip patterns on the app: instead of showing one train trip, the app will break it down into multiple short train trip-segments with ACTIVITY/INACC in between (see image).
Please answer the trip survey for the first train segment only and ignore the rest of the train segments for that trip.
An example of one train trip being broken down into multiple short segments due to poor GPS signal.