This is already the second time this has happened to me with version 15.74 and 15.76. After starting a hiking business, often when I reach the summit I stop and tell my watch to resume my activity later. when I take it back, however, the track on the map disappears, and I don't even see the track I make on the way back, as if the track log had been deactivated. At the end of the activity, however, the trace is saved with all the data so it is only a display problem in a map. Yesterday I tried again by just pausing and the problem did not arise,