I recorded a 60+ km bike ride today, and when I connected the watch to the computer there was a message that something crashed. The ride didn't get added to TomTom Sports and does not appear on the list to 'try again'. I disconnected / reconnected the watch to the computer a few times, with no luck. Then I recorded a dummy activity, thinking it might 'push' syncing back again and sync everything, but no: it did sync my dummy activity, and still no sign of the bike ride.
I suppose the bike ride is still in the watch memory somewhere... how can I recover it?