I saw a previous thread about the same topic, and I am not happy with just going to ttbin and resync when this happens. Would like to log this as a problem so the technical team can see it is not a one-off issue. Would be good if we know why this happens, and how to avoid it.
This morning, I had just run and sync'ed and it also shows up as an activity. The run was started and stopped as per normal, and sync as I usually did on my mobile phone. The record on the phone shows a normal run data.