BUG Report - Auto Lap not working during Workout

Hi, I’ve set up a simple Workout on my Garmin Edge 1050: the warm-up and cool-down cover the ride from and back to my home, while the main interval is on a 3.5 km loop. When I reach the loop, I press the “Lap” button to start the interval, but the Auto Lap feature doesn’t trigger: I've done arround 13 loops but my edge showed only 1. It used to work fine on my Edge 840. Any ideas what I'm doing wrong ?

My Auto Lap Conf :

Auto Lap COnf

My Workout Conf:

Training conf