Your training recording http://www.gps-sport.net/trainings/cycling_55555 seems to stop before you got back home. This could have several reasons:
- device went to standby at this point (this should only happen if the standby button is pushed on error)
- GPS signal was completely lost
Your training data tell me that the training actually did continue for 1/2 hour:
Last position was 9:54 and training stopped at 10:28. If the reason for this is a signal loss, you should update to releas 2.2.8 which reminds you every minute if the signal is not okay.