For the last 2 days in the middle of the afternoon I watch has stopped tracking heart rate and steps. In fact one day I was watching it and I was up to about 15,000 steps around 5:00 p.m. then when I went to go open the app it was showing what I was after my morning walk at 10,000 steps and showed no steps between 11:00 a.m. and 5:00 p.m.. has done this the last two afternoons